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Brain specimens from 30 ostriches were injected with red-dyed latex via the internal carotid arteries (Aa.). The ventral tectal mesencephalic artery (a.), invariably a medium-sized single vessel, was, on the right side, a collateral branch of the caudal branch of the carotid artery (53.4%), a direct branch of the carotid artery (43.3%) and a direct branch of the basilar artery (3.3%) and on the left side, a collateral branch of the caudal branch of the carotid artery (66.7%), a direct branch of the carotid artery (30%), and a direct branch of the basilar artery (3.3%). It vascularized only the ventral half of the optic lobe, with no involvement in cerebellar vascularization on the right (93.3%) and left (80%) sides, extending to the ventrorostral-most cerebellar lobules, which were vascularized on the right (6.7%) and left (20%) sides. The caudal ventral cerebellar arteries were a single vessel on the right (96.7%) and left (93.3%) sides. Its first branch was a common trunk: dorsal spinal-caudal cerebellar on the right (60%) and left (56.6%) sides. Its second branch was the caudal cerebellar artery on the right (76.7%) and left (86.7%) sides. Its third branch was the second component of the caudal cerebellar artery on the right (6.7%) and left (3.3%) sides. The midbrain was vascularized by dorsal and ventral tectal mesencephalic arteries. The cerebellum was vascularized by branches of the caudal ventral cerebellar artery and by the dorsal cerebellar artery.

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Thirty ostrich specimens were injected with red-dyed latex via the internal carotid arteries (Aa.) The middle cerebral and cerebroethmoidal arteries and their branches were systematized. The middle cerebral artery (a.) was always a single large vessel. On the right side, it had two, three, or one developed medial hemispheric branches in 46.6%, 26.7%, and 26.7% of cases, respectively. On the left side, one (36.7%), two (33.3%), and three (30%) developed medial hemispheric branches were observed. The middle cerebral artery had eight (40%), nine (20%), seven (16.7%), eleven (6.7%) ten (6.7%), twelve (3.3%), six (3.3%), and five (3.3%) developed lateral hemispheric branches on the right side and seven (46.7%), nine (13.3%), eight (13.3%), six (10%), five (10%), and ten (6.7%) on the left. Two (33.3%), four (20%), three (20%), one (16.7%), and five (10%) direct perforating branches of the middle cerebral artery were present on the right, and three (33.3%), two (30%), one (13.4%), six (10%), four (10%), and five (3.3%) were present on the left. The cerebroethmoidal artery, always present as a natural continuation of the rostral terminal branch of the brain's carotid artery and originating from the middle cerebral artery, was a large vessel that projected rostromedially, giving off the rostral cerebral artery shortly after its formation and continuing as the ethmoidal artery. The rostral cerebral artery was a single (90%) and double (10%) vessel on the right and a single (96.7%) and double vessel (3.3%) on the left. The ethmoidal artery was always a medium to large single vessel and was the natural continuation of the cerebroethmoidal artery, immediately after giving off the rostral cerebral artery. Anat Rec, 302:1187-1194, 2019. © 2018 Wiley Periodicals, Inc.

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Thirty turtle brains (Trachemys scripta elegans) were injected with latex to systematize and describe the internal carotid arteries and their main ramifications at the brain base. The internal carotid arteries had one intercarotid anastomosis. At the level of the tuber cinereum, the internal carotid artery bifurcated into its terminal branches, the rostral and the caudal branches. The rostral branch emitted the rostral choroid artery, the orbital artery, and a series of middle cerebral arteries. After giving off the last middle cerebral artery, the rostral branch continued as the rostral cerebral artery in the cerebral longitudinal fissure, and had one anastomosis with its contralateral homologous artery, the rostral communicating artery, making the first rostral closure of the cerebral arterial circle. Next, the rostral cerebral arteries anastomosed forming a rostral interhemispheric artery, making the second rostral closure of the cerebral arterial circle. The internal carotid artery, after emitting its rostral branch, continued caudally as the caudal branch. The caudal branch ran caudally along the ventral surface of the mesencephalic tegmentum, emitted the caudal cerebral artery and the mesencephalic artery, and continued caudomedially while progressively narrowing, and anastomosed with its contralateral homologous artery, forming the basilar artery. The narrower portion also emitted the trigeminal artery. The anastomosis of the caudal branches closed the cerebral arterial circle caudally. The internal carotid arteries exclusively supplied the cerebral arterial circle of the turtle. Anat Rec, 299:1090-1098, 2016. © 2016 Wiley Periodicals, Inc.

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Background: Trachemys scripta elegans, in Brazil, has been considered an exotic and invasive turtle; it competes with autochthon species for habitat and food, threatening biodiversity. These animals have been exported to Brazil as pets; however, despite of the commercial interest in the last years, there are only few reports about the turtle central nervous system vascularization. Therefore, this study had the objective to describe and systematize the middle cerebral artery at the brain surface of the turtle (Trachemys scripta elegans), determining a standard model of irrigation and the main ramifications and territory, in this species. Materials, Methods & Results: Thirty turtles received pre-anesthetic medication composed of ketamine (80 mg/kg) and midazolam (2 mg/kg) followed by euthanasia with a sodium thiopental (100 mg/kg) overdose. The aortic arches were cannulated through the single ventricle, the cranial cava veins were incised and the vascular system washed with saline solution and heparin, and then filled with latex. Pieces remained immersed in running water and a bone window was opened in the cranial vault. Samples were fixed with formaldehyde and each brain with a spinal cord segment was removed from the cranial vault, the duramater was removed and the arteries dissected. Results were recorded and it was observed that the middle cerebral artery, collateral [...](AU)

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Background: Trachemys scripta elegans, in Brazil, has been considered an exotic and invasive turtle; it competes with autochthon species for habitat and food, threatening biodiversity. These animals have been exported to Brazil as pets; however, despite of the commercial interest in the last years, there are only few reports about the turtle central nervous system vascularization. Therefore, this study had the objective to describe and systematize the middle cerebral artery at the brain surface of the turtle (Trachemys scripta elegans), determining a standard model of irrigation and the main ramifications and territory, in this species. Materials, Methods & Results: Thirty turtles received pre-anesthetic medication composed of ketamine (80 mg/kg) and midazolam (2 mg/kg) followed by euthanasia with a sodium thiopental (100 mg/kg) overdose. The aortic arches were cannulated through the single ventricle, the cranial cava veins were incised and the vascular system washed with saline solution and heparin, and then filled with latex. Pieces remained immersed in running water and a bone window was opened in the cranial vault. Samples were fixed with formaldehyde and each brain with a spinal cord segment was removed from the cranial vault, the duramater was removed and the arteries dissected. Results were recorded and it was observed that the middle cerebral artery, collateral [...]

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Background: Hemangiosarcoma (HSA) is a malignant tumor of vascular endothelial origin. Primary neoplasms are extremely rare in the third eyelid of dogs. Neoplasia affecting ocular surface has been associated with increased exposure to solar radiation. Treatment reported for dogs with conjunctival neoplasia is surgical excision. Definitive diagnosis is confirmed in the histophatological examination. In this report, we describe a case of HSA of the third eyelid in a dog that was successfully treated with surgical excision.Case: A 5-year-old female Boxer dog was referred to the Ophthalmology Section of the Veterinary Clinics Hospital of the Federal University of Rio Grande do Sul (UFRGS), presenting a red mass in the third eyelid of the right eye. Physical examination it was normal except for the ocular disease. The dog had signs of ocular discomfort an epiphora. On ophthalmic examination a fixed, raised, red mass approximately 4 to 5 mm in diameter was identified on the anterior surface of the third eyelid in the right eye. Under general anesthesia, and using an operating microscope the mass was excised with a gross margin and submitted for histopathological analysis. Microscopic examination revealed a lesion composed of neoplastic mesenchymal cells forming irregular channels containing blood. These plump cells showed moderate anisocytosis and anisokaryosis with a low mitotic...

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Background: Hemangiosarcoma (HSA) is a malignant tumor of vascular endothelial origin. Primary neoplasms are extremely rare in the third eyelid of dogs. Neoplasia affecting ocular surface has been associated with increased exposure to solar radiation. Treatment reported for dogs with conjunctival neoplasia is surgical excision. Definitive diagnosis is confirmed in the histophatological examination. In this report, we describe a case of HSA of the third eyelid in a dog that was successfully treated with surgical excision.Case: A 5-year-old female Boxer dog was referred to the Ophthalmology Section of the Veterinary Clinics Hospital of the Federal University of Rio Grande do Sul (UFRGS), presenting a red mass in the third eyelid of the right eye. Physical examination it was normal except for the ocular disease. The dog had signs of ocular discomfort an epiphora. On ophthalmic examination a fixed, raised, red mass approximately 4 to 5 mm in diameter was identified on the anterior surface of the third eyelid in the right eye. Under general anesthesia, and using an operating microscope the mass was excised with a gross margin and submitted for histopathological analysis. Microscopic examination revealed a lesion composed of neoplastic mesenchymal cells forming irregular channels containing blood. These plump cells showed moderate anisocytosis and anisokaryosis with a low mitotic...(AU)

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Background: The study of the arterial vascularization of the abdominal cavity viscera is essential on the process of learning anatomy. For authors, various anatomical techniques can be used for the preservation of structures, allowing the exploration and visualization of the organs shape in many different ways. Among the techniques there is the angioarchitecture of viscera, with or without the utilization of formaldehyde. The aim of this paper is to describe a technique for anatomical preparation of the intestines (small and large) of dogs and cats using dried viscera and angioarchitecture, to facilitate the study and visualization of the cranial and caudal mesenteric arteries branching.Materials, Methods & Results: Twenty pieces of intestine of dogs and two of cats were used. The intestine was removed from the duodenum to the cranial portion of the rectum, the root of the mesentery was sectioned as well as the cranial and caudal mesenteric arteries. The part was washed, then the caudal and cranial mesenteric and pancreaticoduodenal arteries were ligated, latex was injected in the cranial mesenteric artery and the sample remained immersed in a 10% acetic acid aqueous solution. The cranial portion of the rectum was ligated and, through a cannula into the duodenum, air was insufflated until the viscera were distended. Following that, the part was positioned and fixed, exposed...(AU)

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Background: The study of the arterial vascularization of the abdominal cavity viscera is essential on the process of learning anatomy. For authors, various anatomical techniques can be used for the preservation of structures, allowing the exploration and visualization of the organs shape in many different ways. Among the techniques there is the angioarchitecture of viscera, with or without the utilization of formaldehyde. The aim of this paper is to describe a technique for anatomical preparation of the intestines (small and large) of dogs and cats using dried viscera and angioarchitecture, to facilitate the study and visualization of the cranial and caudal mesenteric arteries branching.Materials, Methods & Results: Twenty pieces of intestine of dogs and two of cats were used. The intestine was removed from the duodenum to the cranial portion of the rectum, the root of the mesentery was sectioned as well as the cranial and caudal mesenteric arteries. The part was washed, then the caudal and cranial mesenteric and pancreaticoduodenal arteries were ligated, latex was injected in the cranial mesenteric artery and the sample remained immersed in a 10% acetic acid aqueous solution. The cranial portion of the rectum was ligated and, through a cannula into the duodenum, air was insufflated until the viscera were distended. Following that, the part was positioned and fixed, exposed...

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Background: Turtles (Trachemys scripta elegans) are exported to many countries with the purpose of being used as pets,however, despite commercial interest, there are few reports on their anatomy, based on this observation we proceeded on toconducting this study. Studies on the collateral branches of the aortic arch were found in domestic and wild species, however,there were few records regarding the turtle. This study aims to describe the collateral branches of the aortic arches and itsmajor branches in the Trachemys scripta elegans, establishing a standard model and the main variations in this species.Materials, Methods & Results: After the Ethics Committee of Animal Use of the Federal University of Rio Grande doSul approved the project, thirty turtles (Trachemys scripta elegans) were used, coming from the sorting centers of the Brazilian Institute of Environment and Natural Resources. The animals underwent preanesthetic medication administration,consisting of ketamine (80 mg/kg) and midazolam (2 mg/kg), administered intramuscularly in the forelimb. Euthanasiawas performed one hour after the preanesthetic medication administration through an overdose of sodium thiopental (100mg/kg) administered by the intracelomic route with subsequent use of vascular doppler for determination of death. Theheart of each animal was accessed, the cardiac apex was sectioned for cannulation of the aortic arches through the singleventricle. The cranial cava veins were sectioned, the vascular system was rinsed with saline solution and filled with latex.The pieces remained immersed in water for polymerization of the latex, being stored in containers with formaldehyde.Subsequently, the arteries with its collateral branches were dissected. Schematic drawings were prepared for the elaboration of the results and the vessels were nominated. In all the samples studied, two atria and one ventricle were found, fromwhich were originated two juxtaposed aortic arches...(AU)

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Background: Turtles (Trachemys scripta elegans) are exported to many countries with the purpose of being used as pets,however, despite commercial interest, there are few reports on their anatomy, based on this observation we proceeded on toconducting this study. Studies on the collateral branches of the aortic arch were found in domestic and wild species, however,there were few records regarding the turtle. This study aims to describe the collateral branches of the aortic arches and itsmajor branches in the Trachemys scripta elegans, establishing a standard model and the main variations in this species.Materials, Methods & Results: After the Ethics Committee of Animal Use of the Federal University of Rio Grande doSul approved the project, thirty turtles (Trachemys scripta elegans) were used, coming from the sorting centers of the Brazilian Institute of Environment and Natural Resources. The animals underwent preanesthetic medication administration,consisting of ketamine (80 mg/kg) and midazolam (2 mg/kg), administered intramuscularly in the forelimb. Euthanasiawas performed one hour after the preanesthetic medication administration through an overdose of sodium thiopental (100mg/kg) administered by the intracelomic route with subsequent use of vascular doppler for determination of death. Theheart of each animal was accessed, the cardiac apex was sectioned for cannulation of the aortic arches through the singleventricle. The cranial cava veins were sectioned, the vascular system was rinsed with saline solution and filled with latex.The pieces remained immersed in water for polymerization of the latex, being stored in containers with formaldehyde.Subsequently, the arteries with its collateral branches were dissected. Schematic drawings were prepared for the elaboration of the results and the vessels were nominated. In all the samples studied, two atria and one ventricle were found, fromwhich were originated two juxtaposed aortic arches...

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Background: The use of animals in attempt to understand biological processes began many years ago with Hippocrates (450 B.C.). Galeno (129-210 a.C.) studied the anatomy and physiology of the monkeys, believing in their similarity to humans. The use of animals in experiments has always been the target of too much criticism by several society segments, questioning animal suffering after manipulation. This is due to the fact that students and professors consider that such practices are against their moral and ethical principles, besides the psychological issues that they can promote. Because of this, alternative and complementary methods were developed for surgical training and motor development of surgeons, with the goal to reduce the number of animals in these practices and to increase qualifi cation and surgical skills. The objective of this study is to offer a complementary method of learning in the area of surgery, specifi cally anatomical techniques as a complementary method for learning nephrotomy.Materials, Methods & Results: Four dog kidneys were used from the pathology sector of the Universidade Federal do Rio Grande do Sul. The kidneys were removed from the abdominal cavity with the perirenal fat, blood vessels and ureter. The renal artery, renal vein and ureter were cannulated and fi lled with red, blue and yellow colored latex, respectively. After this, the kidney

Background: The use of animals in attempt to understand biological processes began many years ago with Hippocrates (450 B.C.). Galeno (129-210 a.C.) studied the anatomy and physiology of the monkeys, believing in their similarity to humans. The use of animals in experiments has always been the target of too much criticism by several society segments, questioning animal suffering after manipulation. This is due to the fact that students and professors consider that such practices are against their moral and ethical principles, besides the psychological issues that they can promote. Because of this, alternative and complementary methods were developed for surgical training and motor development of surgeons, with the goal to reduce the number of animals in these practices and to increase qualifi cation and surgical skills. The objective of this study is to offer a complementary method of learning in the area of surgery, specifi cally anatomical techniques as a complementary method for learning nephrotomy.Materials, Methods & Results: Four dog kidneys were used from the pathology sector of the Universidade Federal do Rio Grande do Sul. The kidneys were removed from the abdominal cavity with the perirenal fat, blood vessels and ureter. The renal artery, renal vein and ureter were cannulated and fi lled with red, blue and yellow colored latex, respectively. After this, the kidney

RESUMEN

Background: The use of animals in attempt to understand biological processes began many years ago with Hippocrates (450 B.C.). Galeno (129-210 a.C.) studied the anatomy and physiology of the monkeys, believing in their similarity to humans. The use of animals in experiments has always been the target of too much criticism by several society segments, questioning animal suffering after manipulation. This is due to the fact that students and professors consider that such practices are against their moral and ethical principles, besides the psychological issues that they can promote. Because of this, alternative and complementary methods were developed for surgical training and motor development of surgeons, with the goal to reduce the number of animals in these practices and to increase qualification and surgical skills. The objective of this study is to offer a complementary method of learning in the area of surgery, specifically anatomical techniques as a complementary method for learning nephrotomy. Materials, Methods & Results: Four dog kidneys were used from the pathology sector of the Universidade Federal do Rio Grande do Sul. The kidneys were removed from the abdominal cavity with the perirenal fat, blood vessels and ureter. The renal artery, renal vein and ureter were cannulated and filled with red, blue and yellow colored latex, respectively. After this, the kidneys were immersed for one hour in running water for latex polymerization. Then, the nephrotomy technique was performed. At each step of the technique, renal structures were observed, incised in a clean and easy way, and each one identified perfectly by color. Discussion: The use of animals in practical classes is still a rule in the most of brazilian universities. Several studies have observed that the teaching of practices, based on alternative techniques instead of vivisection, enabled students to equal or more learning. Virtual reality techniques, handmade devices for training surgical nodes, models for anatomical and physiological study of the ocular and circulatory systems, objects for the practice of venous puncture, artifi cial limbs for surgical practice, models for the practice of microsurgery in small vessels, cylinder with several layers the simulates in every detail a surgical procedure, mannequins, simulators, videos and the use of cadavers and viscera chemically prepared for learning surgical techniques are some of the alternative methods found nowadays. Since it is expected that veterinary medicine students experience real patients, the combination of their acquired knowledge to the practice of complementary methods, helps the student to better understand the technique and facilitates the learning process. When using viscera to help in veterinary surgical technique classes, the students participate more effectively in the classroom, without the stress and fear they face when they first practice with live animals. Furthermore, this alternative allows them to train many times every technique, refining the accuracy, coordination and manual skills, so important for a surgeon. The use of colored latex injected kidneys to simulate nephrotomy proved to be an effective method to complement the training of future surgeons, without loosing teaching quality neither using animals for this purpose.

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Background: The use of animals in attempt to understand biological processes began many years ago with Hippocrates (450 B.C.). Galeno (129-210 a.C.) studied the anatomy and physiology of the monkeys, believing in their similarity to humans. The use of animals in experiments has always been the target of too much criticism by several society segments, questioning animal suffering after manipulation. This is due to the fact that students and professors consider that such practices are against their moral and ethical principles, besides the psychological issues that they can promote. Because of this, alternative and complementary methods were developed for surgical training and motor development of surgeons, with the goal to reduce the number of animals in these practices and to increase qualifi cation and surgical skills. The objective of this study is to offer a complementary method of learning in the area of surgery, specifi cally anatomical techniques as a complementary method for learning nephrotomy.Materials, Methods & Results: Four dog kidneys were used from the pathology sector of the Universidade Federal do Rio Grande do Sul. The kidneys were removed from the abdominal cavity with the perirenal fat, blood vessels and ureter. The renal artery, renal vein and ureter were cannulated and fi lled with red, blue and yellow colored latex, respectively. After this, the kidney

Background: The use of animals in attempt to understand biological processes began many years ago with Hippocrates (450 B.C.). Galeno (129-210 a.C.) studied the anatomy and physiology of the monkeys, believing in their similarity to humans. The use of animals in experiments has always been the target of too much criticism by several society segments, questioning animal suffering after manipulation. This is due to the fact that students and professors consider that such practices are against their moral and ethical principles, besides the psychological issues that they can promote. Because of this, alternative and complementary methods were developed for surgical training and motor development of surgeons, with the goal to reduce the number of animals in these practices and to increase qualifi cation and surgical skills. The objective of this study is to offer a complementary method of learning in the area of surgery, specifi cally anatomical techniques as a complementary method for learning nephrotomy.Materials, Methods & Results: Four dog kidneys were used from the pathology sector of the Universidade Federal do Rio Grande do Sul. The kidneys were removed from the abdominal cavity with the perirenal fat, blood vessels and ureter. The renal artery, renal vein and ureter were cannulated and fi lled with red, blue and yellow colored latex, respectively. After this, the kidney

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Calcinose circunscrita ou calcinose tumoral é uma mineralização ectópica que apresenta-se na forma de depósito de cálcio em tecidos moles e pode manifestar-se em diversas espécies. Alguns autores recomendam usar o termo calcinose tumoral quando a deposição dos sais de cálcio ocorre no tecido periarticular e calcinose circunscrita quando localizada no tecido subcutâneo. Pode ocorrer na coluna vertebral e levar à compressão da medula espinhal. O quadro neurológico, quando se instala é progressivo e provoca distúrbios de leves a moderados. Com exceção da calcinose metastática, o tratamento indicado é a remoção cirúrgica, com baixo índice de recidiva da lesão e redução e/ou resolução das lesões neurológicas. O trabalho teve o objetivo de relatar um caso de compressão de medula espinhal cervical causada por uma calcinose tumoral entre o atlas e o axis em um cão Malamute do Alaska de oito meses de idade, o qual foi submetido a procedimento cirúrgico para remoção do tecido alterado. As alterações histológicas classificaram a massa como uma calcinose tumoral. Devido ao grau de compressão na medula, natureza progressiva da doença e prognóstico favorável, foi feita a opção pela remoção cirúrgica do tumor. Neste caso, a calcinose tumoral determinou compressão da medula espinhal com sinais neurológicos de dor e deficiência funcional leve, assimétrica, da locomoção e de reações posturais.

RESUMEN

Calcinose circunscrita ou calcinose tumoral é uma mineralização ectópica que apresenta-se na forma de depósito de cálcio em tecidos moles e pode manifestar-se em diversas espécies. Alguns autores recomendam usar o termo calcinose tumoral quando a deposição dos sais de cálcio ocorre no tecido periarticular e calcinose circunscrita quando localizada no tecido subcutâneo. Pode ocorrer na coluna vertebral e levar à compressão da medula espinhal. O quadro neurológico, quando se instala é progressivo e provoca distúrbios de leves a moderados. Com exceção da calcinose metastática, o tratamento indicado é a remoção cirúrgica, com baixo índice de recidiva da lesão e redução e/ou resolução das lesões neurológicas. O trabalho teve o objetivo de relatar um caso de compressão de medula espinhal cervical causada por uma calcinose tumoral entre o atlas e o axis em um cão Malamute do Alaska de oito meses de idade, o qual foi submetido a procedimento cirúrgico para remoção do tecido alterado. As alterações histológicas classificaram a massa como uma calcinose tumoral. Devido ao grau de compressão na medula, natureza progressiva da doença e prognóstico favorável, foi feita a opção pela remoção cirúrgica do tumor. Neste caso, a calcinose tumoral determinou compressão da medula espinhal com sinais neurológicos de dor e deficiência funcional leve, assimétrica, da locomoção e de reações posturais.

RESUMEN

Calcinose circunscrita ou calcinose tumoral é uma mineralização ectópica que apresenta-se na forma de depósito de cálcio em tecidos moles e pode manifestar-se em diversas espécies. Alguns autores recomendam usar o termo calcinose tumoral quando a deposição dos sais de cálcio ocorre no tecido periarticular e calcinose circunscrita quando localizada no tecido subcutâneo. Pode ocorrer na coluna vertebral e levar à compressão da medula espinhal. O quadro neurológico, quando se instala é progressivo e provoca distúrbios de leves a moderados. Com exceção da calcinose metastática, o tratamento indicado é a remoção cirúrgica, com baixo índice de recidiva da lesão e redução e/ou resolução das lesões neurológicas. O trabalho teve o objetivo de relatar um caso de compressão de medula espinhal cervical causada por uma calcinose tumoral entre o atlas e o axis em um cão Malamute do Alaska de oito meses de idade, o qual foi submetido a procedimento cirúrgico para remoção do tecido alterado. As alterações histológicas classificaram a massa como uma calcinose tumoral. Devido ao grau de compressão na medula, natureza progressiva da doença e prognóstico favorável, foi feita a opção pela remoção cirúrgica do tumor. Neste caso, a calcinose tumoral determinou compressão da medula espinhal com sinais neurológicos de dor e deficiência funcional leve, assimétrica, da locomoção e de reações posturais.

RESUMEN

Calcinose circunscrita ou calcinose tumoral é uma mineralização ectópica que apresenta-se na forma de depósito de cálcio em tecidos moles e pode manifestar-se em diversas espécies. Alguns autores recomendam usar o termo calcinose tumoral quando a deposição dos sais de cálcio ocorre no tecido periarticular e calcinose circunscrita quando localizada no tecido subcutâneo. Pode ocorrer na coluna vertebral e levar à compressão da medula espinhal. O quadro neurológico, quando se instala é progressivo e provoca distúrbios de leves a moderados. Com exceção da calcinose metastática, o tratamento indicado é a remoção cirúrgica, com baixo índice de recidiva da lesão e redução e/ou resolução das lesões neurológicas. O trabalho teve o objetivo de relatar um caso de compressão de medula espinhal cervical causada por uma calcinose tumoral entre o atlas e o axis em um cão Malamute do Alaska de oito meses de idade, o qual foi submetido a procedimento cirúrgico para remoção do tecido alterado. As alterações histológicas classificaram a massa como uma calcinose tumoral. Devido ao grau de compressão na medula, natureza progressiva da doença e prognóstico favorável, foi feita a opção pela remoção cirúrgica do tumor. Neste caso, a calcinose tumoral determinou compressão da medula espinhal com sinais neurológicos de dor e deficiência funcional leve, assimétrica, da locomoção e de reações posturais.

RESUMEN

Calcinose circunscrita ou calcinose tumoral é uma mineralização ectópica que apresenta-se na forma de depósito de cálcio em tecidos moles e pode manifestar-se em diversas espécies. Alguns autores recomendam usar o termo calcinose tumoral quando a deposição dos sais de cálcio ocorre no tecido periarticular e calcinose circunscrita quando localizada no tecido subcutâneo. Pode ocorrer na coluna vertebral e levar à compressão da medula espinhal. O quadro neurológico, quando se instala é progressivo e provoca distúrbios de leves a moderados. Com exceção da calcinose metastática, o tratamento indicado é a remoção cirúrgica, com baixo índice de recidiva da lesão e redução e/ou resolução das lesões neurológicas. O trabalho teve o objetivo de relatar um caso de compressão de medula espinhal cervical causada por uma calcinose tumoral entre o atlas e o axis em um cão Malamute do Alaska de oito meses de idade, o qual foi submetido a procedimento cirúrgico para remoção do tecido alterado. As alterações histológicas classificaram a massa como uma calcinose tumoral. Devido ao grau de compressão na medula, natureza progressiva da doença e prognóstico favorável, foi feita a opção pela remoção cirúrgica do tumor. Neste caso, a calcinose tumoral determinou compressão da medula espinhal com sinais neurológicos de dor e deficiência funcional leve, assimétrica, da locomoção e de reações posturais.

RESUMEN

Calcinose circunscrita ou calcinose tumoral é uma mineralização ectópica que apresenta-se na forma de depósito de cálcio em tecidos moles e pode manifestar-se em diversas espécies. Alguns autores recomendam usar o termo calcinose tumoral quando a deposição dos sais de cálcio ocorre no tecido periarticular e calcinose circunscrita quando localizada no tecido subcutâneo. Pode ocorrer na coluna vertebral e levar à compressão da medula espinhal. O quadro neurológico, quando se instala é progressivo e provoca distúrbios de leves a moderados. Com exceção da calcinose metastática, o tratamento indicado é a remoção cirúrgica, com baixo índice de recidiva da lesão e redução e/ou resolução das lesões neurológicas. O trabalho teve o objetivo de relatar um caso de compressão de medula espinhal cervical causada por uma calcinose tumoral entre o atlas e o axis em um cão Malamute do Alaska de oito meses de idade, o qual foi submetido a procedimento cirúrgico para remoção do tecido alterado. As alterações histológicas classificaram a massa como uma calcinose tumoral. Devido ao grau de compressão na medula, natureza progressiva da doença e prognóstico favorável, foi feita a opção pela remoção cirúrgica do tumor. Neste caso, a calcinose tumoral determinou compressão da medula espinhal com sinais neurológicos de dor e deficiência funcional leve, assimétrica, da locomoção e de reações posturais.