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BACKGROUND: Pathology of the appendix represents >50% of surgical activity. It is necessary to consider rare pathologies such as mucoceles. These have a high frequency in females with a F/M ratio of 4:1, as well as in patients >50 years of age. The objective of this study is to report on a case of mucinous cystadenoma of the appendix. CLINICAL CASE: We present the case of a 34-year-old male with a history of juvenile rheumatoid arthritis diagnosed at 9 years of age. At 22 years of age, the patient underwent bilateral hip arthroplasty. Since 1998, the patient has presented with renal amyloidosis and has been under steroid treatment to date. The current problem evolved 1 year ago during control studies for his disease. Computed tomography (CT) of the abdomen was done, demonstrating a tumor in the right iliac fossa. Colonoscopy confirmed a tumor with smooth edges located in the cecum. Surgery was recommended with a diagnosis of lipoma of the cecum. During surgery, a large tumor was found, indicating a poor prognosis. Right hemicolectomy was done. Surgical specimen was sent to pathology with a report of mucinous cystadenoma. CONCLUSIONS: The group of symptoms of cystadenoma is nonspecific. Diagnostic methods include X-rays, ultrasound, CT and colonoscopy. Mucinous cystadenoma is the most common form of mucocele of the appendix. Diagnostic protocols are the same for benign appendix pathology. Treatment is surgical and type of surgery depends on the size of the mucocele. Mucoceles of the appendix are pathologies with a favorable prognosis when appropriate treatment is done.

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Introducción: La patología apendicular representa más de 50% de la actividad quirúrgica general, y dentro de ésta hay que considerar las raras, entre las que se incluyen los mucoceles, cuya incidencia es mayor en mujeres (4/1) y en pacientes con edad superior a 50 años. El objetivo de este trabajo es informar un caso de cistoadenoma mucinoso de apéndice. Caso clínico: Hombre de 34 años de edad con diagnóstico a los nueve años de edad de artritis reumatoide juvenil; con prótesis bilateral de cadera a los 22 años. Presenta amiloidosis renal desde 1998 y se encuentra en tratamiento con esteroides hasta el momento de este informe. El cuadro clínico se inició un año atrás, cuando en una tomografía axial computarizada de abdomen de control se encontró tumoración en la fosa iliaca derecha, confirmada por colonoscopia en ciego. Por diagnóstico presuntivo de lipoma fue programado para cirugía; en el transoperatorio se encontró gran tumoración de pronóstico reservado, por lo que se decidió hemicolectomía derecha. El informe de patología de la pieza quirúrgica fue cistoadenoma mucinoso. Conclusiones: La sintomatología del cistoadenoma es inespecífica. Los métodos de diagnóstico incluyen rayos X, ultrasonido, tomografía axial computarizada y colonoscopia. El cistoadenoma es la forma más común de los mucoceles apendiculares y el protocolo de diagnóstico es igual que para patología de apéndice cecal. El tratamiento de elección es la cirugía y depende del tamaño del mucocele. El pronóstico es bueno con el tratamiento adecuado.

BACKGROUND: Pathology of the appendix represents >50% of surgical activity. It is necessary to consider rare pathologies such as mucoceles. These have a high frequency in females with a F/M ratio of 4:1, as well as in patients >50 years of age. The objective of this study is to report on a case of mucinous cystadenoma of the appendix. CLINICAL CASE: We present the case of a 34-year-old male with a history of juvenile rheumatoid arthritis diagnosed at 9 years of age. At 22 years of age, the patient underwent bilateral hip arthroplasty. Since 1998, the patient has presented with renal amyloidosis and has been under steroid treatment to date. The current problem evolved 1 year ago during control studies for his disease. Computed tomography (CT) of the abdomen was done, demonstrating a tumor in the right iliac fossa. Colonoscopy confirmed a tumor with smooth edges located in the cecum. Surgery was recommended with a diagnosis of lipoma of the cecum. During surgery, a large tumor was found, indicating a poor prognosis. Right hemicolectomy was done. Surgical specimen was sent to pathology with a report of mucinous cystadenoma. CONCLUSIONS: The group of symptoms of cystadenoma is nonspecific. Diagnostic methods include X-rays, ultrasound, CT and colonoscopy. Mucinous cystadenoma is the most common form of mucocele of the appendix. Diagnostic protocols are the same for benign appendix pathology. Treatment is surgical and type of surgery depends on the size of the mucocele. Mucoceles of the appendix are pathologies with a favorable prognosis when appropriate treatment is done.

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BACKGROUND: Eccrine glands (sweat glands) appear in all sites of the skin and are more abundant in hands and feet. Nodular hidradenocarcinoma (NH) is a rare malignant and aggressive tumor of the eccrine glands. The objective of this study is to report a case of perianal hidradenocarcinoma. CLINICAL CASE: We present the case of a 75-year-old female with diabetes, hypertension, and hypothyroidism. Physical examination revealed a small perianal tumor that was palpated near the anal canal. Biopsy was done. Pathology report revealed perianal hidradenoma. Rectosigmoidoscopy was normal. Computed tomography showed 1-cm adenopathies in inguinal and right iliac regions. Extensive resection of the tumor was done. Definitive pathology report was malignant eccrine acrospiroma. The patient underwent adjuvant chemotherapy in the Oncology Service and died 1 month later. CONCLUSIONS: In patients with a first symptom of metastases in the inguinal region, suspicion must be directed to the anal canal.

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Introducción: Las glándulas ecrinas (sudoríparas) se encuentran en todos los sitios de la piel y son más abundantes en las palmas de las manos y plantas de los pies. El hidradenocarcinoma nodular es un tumor raro de las glándulas ecrinas, maligno y agresivo. El objetivo de este trabajo es informar de un caso de hidradenocarcinoma perianal. Caso clínico: Mujer de 75 años de edad, diabética, hipertensa e hipotiroidea. Al examen físico se observó y palpó tumoración perianal pequeña que llegaba hasta canal anal; se tomó biopsia con resultado de hidradenoma perianal. Se llevó a cabo rectosigmoidoscopia hasta 25 cm, normal. Tomografía computarizada: adenopatías de 1 cm en región inguinal e iliaca derecha. Se realizó resección amplia de la tumoración. El informe de patología fue acrospiroma ecrino maligno. Actualmente la paciente se encuentra en tratamiento complementario con quimioterapia. Conclusiones: En pacientes que debuten con lesiones malignas metastásicas en región inguinal debe pensarse en origen del conducto anal.

BACKGROUND: Eccrine glands (sweat glands) appear in all sites of the skin and are more abundant in hands and feet. Nodular hidradenocarcinoma (NH) is a rare malignant and aggressive tumor of the eccrine glands. The objective of this study is to report a case of perianal hidradenocarcinoma. CLINICAL CASE: We present the case of a 75-year-old female with diabetes, hypertension, and hypothyroidism. Physical examination revealed a small perianal tumor that was palpated near the anal canal. Biopsy was done. Pathology report revealed perianal hidradenoma. Rectosigmoidoscopy was normal. Computed tomography showed 1-cm adenopathies in inguinal and right iliac regions. Extensive resection of the tumor was done. Definitive pathology report was malignant eccrine acrospiroma. The patient underwent adjuvant chemotherapy in the Oncology Service and died 1 month later. CONCLUSIONS: In patients with a first symptom of metastases in the inguinal region, suspicion must be directed to the anal canal.

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BACKGROUND: The presacral space, which contains different types of embryonic tissue, is a potential site for several tumors including epidermoid cyst. Presacral cysts are divided into two major groups: teratomas and developmental cysts. Presacral developmental cysts are rare congenital injuries with significant manifestations in the adult. Our objective was to report a case of a giant epidermoid presacral and retrorectal cyst. CLINICAL CASE: We present the case of a 28-year-old female whose clinical feature was the presence of a perianal mass and difficult micturition of 8 years. Rectosigmoidoscopy and videocolonoscopy were normal. Simple and contrast abdominal and pelvic tomography (CT) were ordered as well as nuclear magnetic resonance (NMR) imaging to determine extension and location of the tumor. These studies demonstrated three tumors in the presacral space. Surgery using a combined abdominal and perianal approach was done. Pathological report was epidermoid cysts. The patient had a favorable evolution with no reports of fecal incontinence. CONCLUSIONS: The accepted definition describing epidermoid cyst is squamous stratified epithelium with keratohyaline grains, but with no other skin structures. Developmental cysts are slow growing due to their unique location, despite being congenital. Diagnosis is confirmed by ultrasound, CT, and NMR. Biopsy is contraindicated. Three described approaches are abdominal, combined or abdominoposterior, and transsacral, each with its specific indications.

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Introducción: El espacio presacro, el cual contiene algunos tipos de tejidos embrionarios, es un sitio potencial para varios tumores, siendo el quiste epidermoide uno de ellos. Las lesiones quísticas presacras se dividen en dos grupos: teratomas y quistes del desarrollo, estos últimos son lesiones congénitas raras y sus manifestaciones en el adulto son excepcionales. El objetivo de la presente investigación es informar el caso de un quiste epidermoide gigante del espacio presacro y posanal. Caso clínico: Mujer de 28 años con cuadro clínico que se inició ocho años atrás con masa tumoral perianal y dificultad para la micción. La rectosigmoidoscopia y videocolonoscopia fueron normales. Se solicitó tomografía abdominopélvica simple y contrastada, así como resonancia magnética nuclear, para determinar extensión y localización de la tumoración, con las cuales fue posible apreciar tres tumoraciones en el espacio presacro. Se realizó cirugía por abordaje combinado: abdominal y perianal. El examen patológico indicó quistes epidermoides. La paciente evolucionó favorablemente sin datos de incontinencia fecal. Discusión: La descripción aceptada de quiste epidermoide es que posee epitelio escamoso estratificado con gránulos queratohialinos, pero no con otras estructuras de piel. Los quistes del desarrollo son formaciones de crecimiento lento que por su especial localización se manifiestan de forma tardía a pesar de ser congénitos. El diagnóstico se realiza por ultrasonido, tomografía axial computarizada y resonancia magnética nuclear. La biopsia preoperatoria está contraindicada. Se describen tres vías de abordaje: abdominal, combinada o abdominoposterior y transacra, cada una con sus indicaciones.

BACKGROUND: The presacral space, which contains different types of embryonic tissue, is a potential site for several tumors including epidermoid cyst. Presacral cysts are divided into two major groups: teratomas and developmental cysts. Presacral developmental cysts are rare congenital injuries with significant manifestations in the adult. Our objective was to report a case of a giant epidermoid presacral and retrorectal cyst. CLINICAL CASE: We present the case of a 28-year-old female whose clinical feature was the presence of a perianal mass and difficult micturition of 8 years. Rectosigmoidoscopy and videocolonoscopy were normal. Simple and contrast abdominal and pelvic tomography (CT) were ordered as well as nuclear magnetic resonance (NMR) imaging to determine extension and location of the tumor. These studies demonstrated three tumors in the presacral space. Surgery using a combined abdominal and perianal approach was done. Pathological report was epidermoid cysts. The patient had a favorable evolution with no reports of fecal incontinence. CONCLUSIONS: The accepted definition describing epidermoid cyst is squamous stratified epithelium with keratohyaline grains, but with no other skin structures. Developmental cysts are slow growing due to their unique location, despite being congenital. Diagnosis is confirmed by ultrasound, CT, and NMR. Biopsy is contraindicated. Three described approaches are abdominal, combined or abdominoposterior, and transsacral, each with its specific indications.

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