منابع مشابه
Anorectal malignant melanoma: morphologic and immunohistochemical features.
We reviewed 17 cases of primary anorectal malignant melanoma. Morphologic features evaluated included junctional change, pigmentation, morphology, and mitotic rate. Immunohistochemical stains were performed for/with S-100 protein, HMB-45, MelanA, tyrosinase, vimentin, KIT, and pankeratin. Morphologic subtypes were as follows: epithelioid, 12 cases; spindle cell, 7 cases; lymphoma-like, 10 cases...
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Anorectal malignant melanoma is a rare disease and has a uniformly poor prognosis. The following are two reported cases from Buddhachinaraj Hospital. A 55-year-old and a 65-year-old female patients presented with rectal bleeding. Large anorectal masses with regional lymph node involvement were detected initially. They exhibited different histological features which were atypical round cell rese...
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Anorectal melanoma is a rare neoplasm that accounts for less than 1-4% of anorectal malignant tumors. The main therapeutic modality for anorectal melanoma is surgical treatment, with abdominoperineal resection or wide local excision being the most common approaches. A 77-year-old male with a history of cerebral infarction and hypertension presented with anal bleeding. Here, we report a case of ...
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Anorectal malignant melanoma (AMM) is a very rare and aggressive disease. The purpose of this article is to review the clinical features of AMM, to understand treatment options, and optimal therapy by reviewing pertinent literature. Traditionally an abdominoperineal resection (APR) sacrificing the anal sphincter has been performed for radical resection of cancer, but recently, wide excision of ...
متن کاملPrimary Anorectal Melanoma
Primary malignant melanoma of the anus and rectum is a rare and aggressive neoplasm that tends to invade locally and metastasize early in the course of the disease. It is often misdiagnosed as hemorrhoids or as one of the other benign anorectal conditions and is thus linked to an overall poor prognosis and a 5-year survival rate of less than 20%. Optimal treatment is still controversial, and cu...
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ژورنال
عنوان ژورنال: American Journal of Clinical Pathology
سال: 2006
ISSN: 0002-9173,1943-7722
DOI: 10.1309/dvwltv8ffkc3l80h