A Case of Primary Melanoma of the Anus that Spread to the Submucosa of the Rectum / 대한소화기내시경학회지
Korean Journal of Gastrointestinal Endoscopy
; : 299-302, 2008.
Article
em Ko
| WPRIM
| ID: wpr-183186
Biblioteca responsável:
WPRO
ABSTRACT
Primary malignant melanoma of the anorectum is rare, representing about 1% of all colorectal carcinoma and less than 1% of all melanomas. The most common symptom of malignant melanoma of the anorectum is anal bleeding and this is often misdiagnosed as hemorrhoids. A 72-year-old female patient was admitted due to intermittent anal bleeding for 6 months. Colonoscopic examination showed a large exophytic mass with an irregularly ulcerated and greenish-brown pigmentation on the anus and the examination also simultaneously showed a submucosal tumor-like lesion in the rectum that was located 5 cm from the anal verge. Light microscopy of the tumor revealed malignant melanocytes and the tumor cells reacted positively for immunohistochemical staining with S-100 protein and HMB-45. Distant metastasis to the brain was detected on brain MRI.
Palavras-chave
Texto completo:
1
Base de dados:
WPRIM
Assunto principal:
Canal Anal
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Reto
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Úlcera
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Encéfalo
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Pigmentação
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Neoplasias Colorretais
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Proteínas S100
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Hemorragia
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Hemorroidas
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Luz
Limite:
Aged
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Female
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Humans
Idioma:
Ko
Revista:
Korean Journal of Gastrointestinal Endoscopy
Ano de publicação:
2008
Tipo de documento:
Article