health
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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…
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Clinical features •Exceedingly rare tumor comprising squamous cell carcinoma (in the superficial part) and adenocarcinoma in the deeper reaches. Often misdiagnosed in shave biopsies & sometimes confused with microcystic adnexal carcinoma •Middle aged to elderly patients •Slight predilection for males •Head, neck & extremities on sun-damaged skin •Recurrences common, may spread to lymph nodes or systemically & can rarely cause death…
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Clinical features •Presents as a small pigmented papule or nodule on sun-damaged skin •3m:1F •28-92 years (mean 70) •0.2-2.5 cm (mean 0.8) diameter •Head, extremities, trunk in descending order of frequency Rarely recurs Histological features •Well circumscribed nodular or multinodular growth pattern •Admixture of basaloid matrical, supramatricial & eosinophilic shadow cells with dendritic melanocytes. The ghost cell change is distinctive affecting…
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Clinical features •Although often classified as periocular or extraocular, this has little merit since there is no difference between the two groups in terms of overall survival •Periocular tumors mostly arise from the meibomian glands and present as a mass in the upper eyelid •Extraocular tumors most often present on the head and neck although they may arise in a very wide variety of sites. …
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Clinical features •Very rare •M=F •Age range 18-91 •Axilla>>scalp, eyelid, ear, anogenital region, chest, lip & wrist •Slowly growing sometimes ulcerated nodule or plaque •Rarely develops in a nevus sebaceus or complicates a benign precursor apocrine tumor •Often slowly growing and fairly indolent although high grade variants are not uncommon •Metastases to lymph nodes (50%), lung and bone •Recurrence rate 28% •Median survival: 51.5 months •Nodal and distant…
McKee Derm 