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1.
J Med Case Rep ; 18(1): 385, 2024 Aug 21.
Artículo en Inglés | MEDLINE | ID: mdl-39164743

RESUMEN

BACKGROUND: Telangiectatic osteosarcoma is rare and it rarely affects flat bones, especially the bones of the pelvis. It is uncommon for telangiectatic osteosarcoma to be considered as a differential diagnosis when assessing a large intrabdominal mass. CASE REPORT: We present our case of a 33-year-old African female who presented with a sizeable telangiectatic osteosarcoma of the left iliac bone. She reported a 3-year duration of a painless, slow-growing mass arising from the left flank. At examination, a large bony hard mass extending from the left ilium to the umbilicus was noted, almost mimicking an intra-abdominal pregnancy. All laboratory tests were within normal limits and an unconventional surgical approach was used for a one-stage excision of the tumor without complications. The definitive histopathological diagnosis postexcision was that of a telangiectatic osteosarcoma only on the second review of the histological specimen. CONCLUSIONS: Pelvic telangiectatic osteosarcoma is rare, and the ilium is the commonly affected pelvic bone. These tumors can be sizeable at presentation with intra-abdominal or pelvic extension with a high chance of misdiagnosis. Fortunately surrounding soft tissue involvement seems to be a rare and late finding when present.


Asunto(s)
Neoplasias Óseas , Ilion , Osteosarcoma , Telangiectasia , Humanos , Femenino , Osteosarcoma/patología , Osteosarcoma/diagnóstico por imagen , Osteosarcoma/cirugía , Osteosarcoma/diagnóstico , Adulto , Telangiectasia/patología , Telangiectasia/diagnóstico , Neoplasias Óseas/patología , Neoplasias Óseas/cirugía , Neoplasias Óseas/diagnóstico por imagen , Neoplasias Óseas/diagnóstico , Ilion/patología , Ilion/diagnóstico por imagen , Diagnóstico Diferencial , Tomografía Computarizada por Rayos X
2.
Int J Mol Sci ; 25(14)2024 Jul 12.
Artículo en Inglés | MEDLINE | ID: mdl-39062925

RESUMEN

Telangiectases and arteriovenous malformations (AVMs) are the characteristic lesions of Hereditary Hemorrhagic Telangiectasia (HHT). Somatic second-hit loss-of-function variations in the HHT causative genes, ENG and ACVRL1, have been described in dermal telangiectasias. It is unclear if somatic second-hit mutations also cause the formation of AVMs and nasal telangiectasias in HHT. To investigate the genetic mechanism of AVM formation in HHT, we evaluated multiple affected tissues from fourteen individuals. DNA was extracted from fresh/frozen tissue of 15 nasal telangiectasia, 4 dermal telangiectasia, and 9 normal control tissue biopsies, from nine unrelated individuals with HHT. DNA from six formalin-fixed paraffin-embedded (FFPE) AVM tissues (brain, lung, liver, and gallbladder) from five individuals was evaluated. A 736 vascular malformation and cancer gene next-generation sequencing (NGS) panel was used to evaluate these tissues down to 1% somatic mosaicism. Somatic second-hit mutations were identified in three in four AVM biopsies (75%) or half of the FFPE (50%) samples, including the loss of heterozygosity in ENG in one brain AVM sample, in which the germline mutation occurred in a different allele than a nearby somatic mutation (both are loss-of-function mutations). Eight of nine (88.9%) patients in whom telangiectasia tissues were evaluated had a somatic mutation ranging from 0.68 to 1.96% in the same gene with the germline mutation. Six of fifteen (40%) nasal and two of four (50%) dermal telangiectasia had a detectable somatic second hit. Additional low-level somatic mutations in other genes were identified in several telangiectasias. This is the first report that nasal telangiectasias and solid organ AVMs in HHT are caused by very-low-level somatic biallelic second-hit mutations.


Asunto(s)
Malformaciones Arteriovenosas , Telangiectasia Hemorrágica Hereditaria , Humanos , Telangiectasia Hemorrágica Hereditaria/genética , Telangiectasia Hemorrágica Hereditaria/complicaciones , Telangiectasia Hemorrágica Hereditaria/patología , Femenino , Masculino , Persona de Mediana Edad , Malformaciones Arteriovenosas/genética , Malformaciones Arteriovenosas/patología , Adulto , Endoglina/genética , Anciano , Mutación , Receptores de Activinas Tipo II/genética , Telangiectasia/genética , Telangiectasia/patología , Secuenciación de Nucleótidos de Alto Rendimiento
3.
Rev Esp Patol ; 57(3): 225-229, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38971623

RESUMEN

Telangiectatic osteosarcoma (TOS) is a rare variant of osteosarcoma that typically affects young individuals and long bones. The case under discussion was seen in the mandible of a 57-year-old female and had rapidly grown in size within a week. Microscopically, the tumour was characterised by large vascular cavities surrounded by anaplastic cells. Thin lacy tumour osteoid was observed at various foci. Abundant multinucleated osteoclastic giant cells along with areas of necrosis were also noted. The tumour cells were positive for SATB2, while negative for Cytokeratin AE1/3, CD 34. Ki-67 positivity was observed in more than 50% of tumour cells. A diagnosis of high grade telangiectatic osteosarcoma was thus made.


Asunto(s)
Neoplasias Mandibulares , Osteosarcoma , Telangiectasia , Humanos , Osteosarcoma/patología , Osteosarcoma/química , Femenino , Neoplasias Mandibulares/patología , Neoplasias Mandibulares/diagnóstico , Diagnóstico Diferencial , Persona de Mediana Edad , Telangiectasia/patología
4.
J Cosmet Dermatol ; 23(9): 2895-2904, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-38943266

RESUMEN

OBJECTIVE: To assess the effectiveness and safety of treating erythematotelangiectatic rosacea using fractional radiofrequency (FRF). METHODS: Twenty patients with a confirmed diagnosis of erythema capillaris rosacea were selected, and one side of each patient's face was randomly assigned to receive FRF treatments for three to six times, with an interval of 2 weeks between each treatment. VISIA, dermoscopy, and the Clinician's Erythema Evaluation Scale (CEA) were applied to evaluate the efficacy of the treatment before and after the treatment, to record the VAS scores and adverse reactions, and to conduct a patient satisfaction survey. RESULTS: The characteristic counts and scores of red zone and porphyrin as assessed by VISIA test were significantly decreased, and the difference between the treated side and the pretreatment side was statistically significant (p < 0.05), and the efficacy of the treatment was statistically insignificant compared with the control side, except for the red zone and porphyrin which were statistically significant before and after the treatment (p > 0.05). By CEA score, the difference between the treated side after treatment and the control side was statistically significant (p < 0.05), and the difference between the treated side before and after treatment was statistically significant (p < 0.05); the difference between the control side before and after treatment was not statistically significant (p > 0.05). Dermatoscopic observation showed reduction in pore size, reduction of yellowish-white and black horn plugs within the pores, lightening of the red background and thinning and blurring of the capillary structure on the treated side of the skin compared to the control side, and the skin on the treated side showed the above mentioned changes before and after the treatment as well. The mean pain score of the subjects was obtained by VAS score 3.67 ± 0.90. Adverse effects included mild edema, erythema, and microscopic crusting; no long-term adverse effects were seen in all patients. The efficacy of FRF treatment was evaluated 1 month after the final treatment, and 85% of the subjects rated it as satisfactory, very satisfactory, and very satisfactory. CONCLUSION: FRF for the treatment of erythematous capillary dilatation rosacea is effective, safe, and suitable for clinical promotion.


Asunto(s)
Satisfacción del Paciente , Rosácea , Humanos , Rosácea/terapia , Rosácea/diagnóstico , Rosácea/radioterapia , Femenino , Adulto , Persona de Mediana Edad , Resultado del Tratamiento , Masculino , Terapia por Radiofrecuencia/efectos adversos , Terapia por Radiofrecuencia/métodos , Dermoscopía , Eritema/etiología , Eritema/terapia , Telangiectasia/terapia , Telangiectasia/radioterapia , Telangiectasia/diagnóstico por imagen , Adulto Joven , Índice de Severidad de la Enfermedad , Cara , Piel/efectos de la radiación , Piel/patología , Piel/diagnóstico por imagen , Piel/irrigación sanguínea , Anomalías Múltiples , Cejas/anomalías , Enfermedad de Darier
5.
Lasers Med Sci ; 39(1): 164, 2024 Jun 27.
Artículo en Inglés | MEDLINE | ID: mdl-38935161

RESUMEN

Telangiectasias are the most frequent type of sequelae of infantile hemangiomas after involution. Few studies have reported the treatment of telangiectasias with 595-nm pulsed dye lasers. Therefore, the objective of this study was to assess the efficacy and safety of a 595-nm pulsed dye laser for treating residual telangiectasias following hemangioma involution. This is a retrospective case series that analyzes the medical records and reviews the charts of 22 patients who had undergone 595-nm pulsed dye laser treatment for residual telangiectasias. Pre- and post-treatment digital images were independently assessed, and the changes were scored to ascertain the efficacy of the treatment (0 = no change, 4 = complete improvement). Of the 22 patients, 59.1% experienced complete resolution of telangiectasias following treatment. No serious complications or side effects were reported. The observations indicate that the 595-nm pulsed dye laser is effective and safe for treating residual telangiectasias following hemangioma involution.


Asunto(s)
Hemangioma , Láseres de Colorantes , Telangiectasia , Humanos , Estudios Retrospectivos , Láseres de Colorantes/uso terapéutico , Telangiectasia/radioterapia , Telangiectasia/cirugía , Femenino , Masculino , Lactante , Hemangioma/radioterapia , Resultado del Tratamiento , Preescolar , Terapia por Luz de Baja Intensidad/métodos
7.
BMJ Case Rep ; 17(5)2024 May 08.
Artículo en Inglés | MEDLINE | ID: mdl-38719246

RESUMEN

Cutis marmorata telangiectatica congenita is a rare congenital vascular malformation characterised by cutaneous vascular abnormalities, typically diagnosed at birth or in the early postnatal period. Although typically benign, this disease is associated with other systemic abnormalities, including rare ocular alterations, such as congenital glaucoma, cataracts and retinopathy.This manuscript describes a female infant, who presented with generalised livedo reticularis, a band of alopecia and cutaneous atrophy in the temporal region above the coronal suture. The patient was diagnosed with cutis marmorata telangiectatica congenita by a paediatrician, and an ophthalmological evaluation was requested. A funduscopy examination in both eyes showed temporal and superior retina with avascular areas with new vessels, venous dilations and shunts, and no retinal detachments. Given these findings, we performed retinal photocoagulation laser treatment with excellent results.This case report highlights the importance of early ophthalmological evaluation of children with this disease to prevent secondary complications, such as vitreous haemorrhage and tractional retinal detachment.


Asunto(s)
Livedo Reticularis , Enfermedades Cutáneas Vasculares , Telangiectasia , Humanos , Femenino , Telangiectasia/congénito , Telangiectasia/complicaciones , Telangiectasia/diagnóstico , Enfermedades Cutáneas Vasculares/diagnóstico , Enfermedades Cutáneas Vasculares/complicaciones , Lactante , Coagulación con Láser/métodos , Vasos Retinianos/anomalías , Vasos Retinianos/diagnóstico por imagen , Retina/anomalías , Retina/diagnóstico por imagen
11.
Eur J Med Genet ; 69: 104942, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38677542

RESUMEN

Telangiectasia-ectodermal dysplasia-brachydactyly-cardiac anomaly (TEBC) syndrome is a rare autosomal dominant condition, recently linked to the protein kinase D1 (PRKD1) gene. The phenotype of TEBC remains incomplete at this point. Our aim is to improve the characterization of the clinical and molecular aspects of the TEBC syndrome. We report on the 8th patient carrying a heterozygous de novo variation of PRKD1 c.2134G > A, p. (Val712Met) identified by trio exome sequencing. The proband presents with partial atrioventricular septal defect, brachydactyly, ectodermal dysplasia, telangiectasia that developed in childhood, intellectual disability with microcephaly, multicystic renal dysplasia and moderate hormonal resistance. In view of this 8th description and review of the literature, it appears that neurodevelopmental disorders and microcephaly are frequently associated with PRKD1 missense variants, adding to the four main clinical signs described initially in the TEBC syndrome. Further descriptions are required to confirm the observed endocrine and kidney abnormalities. This should contribute to a more comprehensive understanding of the phenotypic spectrum and may help establish genotype-phenotype correlations. In the context of genotype-first strategy, accurate patient descriptions are fundamental. Characterization of specific syndromic associations is essential for variant interpretation support and patient follow-up, even in very rare diseases, such as the TEBC syndrome.


Asunto(s)
Displasia Ectodérmica , Cardiopatías Congénitas , Humanos , Displasia Ectodérmica/genética , Displasia Ectodérmica/patología , Cardiopatías Congénitas/genética , Cardiopatías Congénitas/patología , Fenotipo , Braquidactilia/genética , Braquidactilia/patología , Masculino , Telangiectasia/genética , Telangiectasia/patología , Femenino , Mutación Missense , Síndrome , Microcefalia/genética , Microcefalia/patología , Niño , Proteína Quinasa C
12.
Mycoses ; 67(4): e13721, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38570912

RESUMEN

BACKGROUND: Psoriatic patients may experience the coexistence of onychomycosis (OM). However, the evaluation of OM in psoriatics has been hindered by potential clinical differences from OM in non-psoriatics. OBJECTIVE: To assess and compare dermoscopic features between toenail OM in psoriatic and in non-psoriatic patients. PATIENTS AND METHODS: Between September 2020 and September 2023, dermoscopy was conducted on 183 affected toenails by OM in psoriatics and 232 affected toenails by OM in non-psoriatics in two centres. The dermoscopic characteristics were compared using the Chi-squared test. RESULTS: Among toenail OM cases in psoriatic subjects, the most prevalent dermoscopic features included pitting (147/183, 80.33%) and subungual hyperkeratosis (118/183, 64.48%). Conversely, toenail OM in non-psoriatics was characterized by subungual hyperkeratosis (175/232, 75.43%) and nail spikes (139/232, 59.91%). Comparative analysis revealed a significantly higher occurrence of pitting (80.33% vs. 15.96%, p < .001), periungual telangiectasis (22.40% vs. 4.74%, p < .001), oil patches (12.57% vs. 0.43%,p < .001) and transverse grooves (43.72% vs. 28.45%,p < .01) in toenail OM in psoriatics. Furthermore, toenail OM in psoriatics exhibited a significantly lower frequency of yellow structureless area (13.11% vs. 42.67%, p < .001), nail spikes (43.17% vs. 59.91%, p < .01), ruin appearance of sulphur nugget (8.20% vs. 31.03%, p < .001), dotted/blocky haemorrhage (6.01% vs. 20.69%,p < .001) and partial onycholysis (32.79% vs. 46.98%, p < .01). CONCLUSIONS: Dermoscopic features of toenail OM in psoriatic and non-psoriatic patients exhibit notable differences. OM in psoriatics shows a higher frequency of pitting and periungual telangiectasis, while a lower frequency of yellow structureless areas and nail spikes under dermoscopy.


Asunto(s)
Queratosis , Enfermedades de la Uña , Onicomicosis , Telangiectasia , Humanos , Onicomicosis/epidemiología , Onicomicosis/complicaciones , Uñas , Estudios Prospectivos , Queratosis/complicaciones , Telangiectasia/complicaciones
13.
Clin Exp Rheumatol ; 42(8): 1665-1668, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38526006

RESUMEN

OBJECTIVES: Hand involvement in patients with systemic sclerosis (SSc) is responsible for 75% of the overall disability but varies greatly among individuals. No study has yet compared the functionalities between the two hands of SSc patients. We thus evaluated the joint limitations and extent of skin involvement in the dominant and contralateral hands. METHODS: This prospective, descriptive, comparative single-centre study enrolled SSc patients diagnosed using the ACR/EULAR criteria. We assessed limitations in the joint range of motion during active and passive mobilisation; the first commissure opening angles; the Kapandji scale and Rodnan hand scores; the digital pressures; the finger brachial pressure indices; and the number of telangiectasias, calcinosis, digital ulcerations, and painful joints on each hand. RESULTS: Thirty patients were included. Spontaneous flexion joint limitations were significantly greater in the dominant hand (p<0.0001). The Kapandji score was lower (p<0.001) and the Rodnan hand score significantly higher, for the dominant hand (p<0.001). The digital pressure was similar between the hands. CONCLUSIONS: The dominant hand exhibited significantly more skin sclerosis and mean flexion deterioration, a lower Kapandji score, and a tendency toward reduced mean extension, compared with the other hand. No vascular pathology was noted in either hand. Larger studies are needed to confirm these results and to draw therapeutic conclusions.


Asunto(s)
Evaluación de la Discapacidad , Rango del Movimiento Articular , Esclerodermia Sistémica , Humanos , Femenino , Persona de Mediana Edad , Masculino , Estudios Prospectivos , Esclerodermia Sistémica/fisiopatología , Esclerodermia Sistémica/complicaciones , Esclerodermia Sistémica/diagnóstico , Anciano , Adulto , Mano/fisiopatología , Índice de Severidad de la Enfermedad , Telangiectasia/fisiopatología , Telangiectasia/etiología , Piel/patología , Piel/irrigación sanguínea , Articulaciones de la Mano/fisiopatología , Estado Funcional
14.
J Vasc Surg Venous Lymphat Disord ; 12(4): 101874, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38522666

RESUMEN

OBJECTIVE: Telangiectasias, characterized by dilated venules, are frequently observed in the lower extremities. Sclerotherapy stands out as the predominant treatment of these vascular lesions. The integration of laser therapy with a mild sclerosing agent, serving as an osmotic sclerosant, presents an enhanced cosmetic treatment approach, aiming to optimize outcomes and minimize potential adverse effects. This study sought to evaluate the feasibility, efficacy, and safety of cryo-laser and cryo-sclerotherapy (CLaCS) and compare it with injection sclerotherapy for the treatment of telangiectasia and reticular veins. METHODS: In this randomized controlled trial, individuals expressing concerns about telangiectasia and reticular veins were recruited for aesthetic treatment. The enrolled patients were prospectively randomized according to the chosen treatment technique. Group A included patients undergoing CLaCS with 70% dextrose, focusing on a single area measuring 20 cm by 20 cm. Group B included patients receiving polidocanol injection sclerotherapy for a single area of the same dimensions. RESULTS: Group A comprised 195 patients and group B comprised 197 patients. The rates of complete lesion elimination after the first, second, and third treatment sessions were 64.6%, 86.2%, and 100% in group A and 50.3%, 74.1%, and 85.3% in group B, respectively. Group A exhibited a significantly higher complete elimination rate compared with group B at the conclusion of the study (P < .001). Furthermore, group A demonstrated a statistically significant lower incidence of postprocedural pigmentation and other complications compared with group B (P < .001). These findings underscore the enhanced efficacy and safety profile associated with the CLaCS technique using 70% dextrose compared with injection sclerotherapy with polidocanol. CONCLUSIONS: CLaCS, combining cryo-laser and cryo-sclerotherapy, demonstrated superior efficacy and safety compared with traditional polidocanol sclerotherapy for treating telangiectasia and reticular veins.


Asunto(s)
Polidocanol , Soluciones Esclerosantes , Escleroterapia , Telangiectasia , Humanos , Telangiectasia/terapia , Escleroterapia/efectos adversos , Escleroterapia/métodos , Femenino , Masculino , Soluciones Esclerosantes/administración & dosificación , Soluciones Esclerosantes/efectos adversos , Adulto , Polidocanol/administración & dosificación , Polidocanol/uso terapéutico , Persona de Mediana Edad , Resultado del Tratamiento , Estudios Prospectivos , Criocirugía/efectos adversos , Polietilenglicoles/administración & dosificación , Glucosa/administración & dosificación , Venas/diagnóstico por imagen , Estudios de Factibilidad , Terapia por Láser/efectos adversos , Adulto Joven , Anciano , Factores de Tiempo
16.
Am J Dermatopathol ; 46(5): 292-304, 2024 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-38513131

RESUMEN

ABSTRACT: Cutaneous collagenous vasculopathy (CCV) is a rare and idiopathic microangiopathy of superficial dermal blood vessels. There have been 75 cases described in the literature to date, not including the current report; however, given its clinical similarity to other primary telangiectasias, it is likely to be underreported and underdiagnosed. Here, we describe the clinical and histological features of 2 patients we newly diagnosed with CCV. Both generally fit the profile of prior cases and confirm previously described associations-they both are older White women, have rashes on their lower extremities, and have conditions and medications that are common among other reported cases. However, both are also somewhat atypical, as Patient 1 had symptomatic CCV and Patient 2 had a papular rash. As such, both cases broaden the spectrum of our current understanding of CCV. We also provide a comprehensive review of all published reports of CCV to date and uncover 2 previously unreported associations: one with visceral malignancy, and the other with hypothyroidism. Whether these association are coincidental is worth investigating in future studies.


Asunto(s)
Enfermedades Cutáneas Vasculares , Telangiectasia , Femenino , Humanos , Diagnóstico Diferencial , Extremidad Inferior/patología , Enfermedades Cutáneas Vasculares/patología , Telangiectasia/patología
19.
Am J Med Genet A ; 194(6): e63551, 2024 06.
Artículo en Inglés | MEDLINE | ID: mdl-38321651

RESUMEN

Capillary malformations (CMs) are the most common type of vascular anomalies, affecting around 0.3% of newborns. They are usually caused by somatic pathogenic variants in GNAQ or GNA11. PIK3CA and PIK3R1, part of the phosphoinositide 3-kinase-protein kinase B-mammalian target of rapamycin pathway, are mutated in fainter CMs such as diffuse CM with overgrowth and megalencephaly CM. In this study, we present two young patients with a CM-like phenotype associated with cerebral anomalies and severe epilepsy. Pathogenic variants in PIK3CA and PIK3R1, as well as GNAQ and GNA11, were absent in affected cutaneous tissue biopsies. Instead, we identified two somatic pathogenic variants in the AKT3 gene. Subsequent analysis of the DNA obtained from surgically resected brain tissue of one of the two patients confirmed the presence of the AKT3 variant. Focal cortical dysplasia was also detected in this patient. Genetic analysis thus facilitated workup to reach a precise diagnosis for these patients, associating the vascular anomaly with the neurological symptoms. This study underscores the importance of searching for additional signs and symptoms to guide the diagnostic workup, especially in cases with atypical vascular malformations. In addition, it strongly emphasizes the significance of genotype-phenotype correlation studies in guiding clinicians' informed decision-making regarding patient care.


Asunto(s)
Capilares , Epilepsia , Proteínas Proto-Oncogénicas c-akt , Telangiectasia , Malformaciones Vasculares , Femenino , Humanos , Recién Nacido , Masculino , Capilares/anomalías , Capilares/patología , Epilepsia/genética , Epilepsia/patología , Estudios de Asociación Genética , Predisposición Genética a la Enfermedad , Mosaicismo , Mutación/genética , Fenotipo , Proteínas Proto-Oncogénicas c-akt/genética , Telangiectasia/genética , Telangiectasia/patología , Telangiectasia/diagnóstico , Malformaciones Vasculares/genética , Malformaciones Vasculares/patología , Malformaciones Vasculares/diagnóstico , Malformaciones Vasculares/complicaciones , Adolescente
20.
J Imaging Inform Med ; 37(3): 1137-1150, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38332404

RESUMEN

In recent years, deep learning (DL) has been used extensively and successfully to diagnose different cancers in dermoscopic images. However, most approaches lack clinical inputs supported by dermatologists that could aid in higher accuracy and explainability. To dermatologists, the presence of telangiectasia, or narrow blood vessels that typically appear serpiginous or arborizing, is a critical indicator of basal cell carcinoma (BCC). Exploiting the feature information present in telangiectasia through a combination of DL-based techniques could create a pathway for both, improving DL results as well as aiding dermatologists in BCC diagnosis. This study demonstrates a novel "fusion" technique for BCC vs non-BCC classification using ensemble learning on a combination of (a) handcrafted features from semantically segmented telangiectasia (U-Net-based) and (b) deep learning features generated from whole lesion images (EfficientNet-B5-based). This fusion method achieves a binary classification accuracy of 97.2%, with a 1.3% improvement over the corresponding DL-only model, on a holdout test set of 395 images. An increase of 3.7% in sensitivity, 1.5% in specificity, and 1.5% in precision along with an AUC of 0.99 was also achieved. Metric improvements were demonstrated in three stages: (1) the addition of handcrafted telangiectasia features to deep learning features, (2) including areas near telangiectasia (surround areas), (3) discarding the noisy lower-importance features through feature importance. Another novel approach to feature finding with weak annotations through the examination of the surrounding areas of telangiectasia is offered in this study. The experimental results show state-of-the-art accuracy and precision in the diagnosis of BCC, compared to three benchmark techniques. Further exploration of deep learning techniques for individual dermoscopy feature detection is warranted.


Asunto(s)
Carcinoma Basocelular , Aprendizaje Profundo , Neoplasias Cutáneas , Telangiectasia , Humanos , Carcinoma Basocelular/diagnóstico por imagen , Carcinoma Basocelular/diagnóstico , Carcinoma Basocelular/patología , Neoplasias Cutáneas/diagnóstico , Neoplasias Cutáneas/diagnóstico por imagen , Neoplasias Cutáneas/patología , Telangiectasia/diagnóstico por imagen , Telangiectasia/patología , Telangiectasia/diagnóstico , Interpretación de Imagen Asistida por Computador/métodos , Dermoscopía/métodos , Sensibilidad y Especificidad
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