melanoma
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Two subtypes Melanoma arising in a pre-existent blue nevus (common or more often cellular) or denritic melanocytosis including nevus of Ota, Ita & pilar neurocristic hamtoma Melanoma in which blue nevus-like features (dendritic cells & melanophages) are seen within a spindled or epithelioid melanoma Clinical features •Usually slowly growing tumors •Predilection for the scalp •M>F •No age predilection & exceptionally, lesions can develop in children…
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Clinical features •Very rare variant of melanoma •M=F •Middle aged to elderly (mean age 57 years) •Back> lower & upper extremities> head & neck> choroid •Often ulcerated nodules •Balloon cells may be present in a metastasis & not in the primary tumor (and vice versa) •Poor prognosis is likely related to large tumor size at presentation Histological…
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Definition & clinical features •A melanoma which you diagnosed as nevus and wish that you hadn’t!; a melanoma that closely mimics especially on scanning magnification •The correct diagnosis often comes to light when it recurs or metastasizes •Results from insufficient time being spend on a nevoid lesion •Behaves no differently than any other melanoma •Everyone…
