Superficial Amelanotic Melanocarcinoma or Precancerous Melanoma
نویسندگان
چکیده
منابع مشابه
Subungual amelanotic malignant melanoma.
We report a 61-year-old, male patient complaining from prolonged lesion on his great toe that has been previously treated surgically. Histopathological examination of toenail specimen revealed the presence of nests of atypical tumor cells that led to the diagnosis of amelanotic malignant melanoma. Four years ago, he was diagnosed as gout due to extreme erythema and edema in the same toe. He has...
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Clinical and histopathological features of four cases of multifocal amelanotic malignant melanoma of the conjunctiva in association with 'acquired melanosis sine pigmento' are reported. The absence ofconjunctival pigmentation in this extremely rare combination of lesions prevented early diagnosis and clinical monitoring. As a result orbital exenteration was required in three cases. This multice...
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Malignant melanomas of the mucosal regions of the head and neck are extremely rare neoplasms accounting for less than 1% of all melanomas. Approximately half of all head and neck melanomas occur in the oral cavity. Less than 2% of all melanomas lack pigmentation, in the oral mucosa however, up to 75% of cases are amelanotic. No etiologic factors or risk factors have been recognized for oral mel...
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Dermatoscopy of melanocytic lesions has guided the decision of when or not to biopsy a lesion. The use of this tool has increased clinical examination's sensitivity and specificity in 89% and 96% respectively. However, dermatoscopic evaluation of amelanotic or hypomelanotic melanomas, as well as metastases, can be difficult. There is still no standardization for the analysis of these pathologie...
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DERMOSCOPIC APPEARANCE The dermoscopic analysis (Fig 2) revealed peripheral dotted vessels, linear irregular vessels, milky red areas, and white streaks, suggestive of melanoma. However, there were no structures or vascular patterns found in cutaneous epitheliomas, such as leaf-like areas, blue-gray ovoid nests, or arborizing or glomerular vessels. It is noteworthy that no brown, black, gray, o...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society of Medicine
سال: 1949
ISSN: 0035-9157
DOI: 10.1177/003591574904201139