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In this section we have spot diagnoses posted on a daily basis since June 2010, now over 1700! You can review the archived cases and read the suggested diagnoses by users and the final comment by Dr Uma Sundram, the Editor-in-Chief and main spot diagnosis host. Case are uploaded each week day by 10 a.m. UK time with the correct diagnosis will generally be posted at 8 p.m. UK time. Why not view the most recent spot diagnosis and proffer a diagnosis?

Case Number : Case 2189 - 30 October 2018 Posted By: Uma Sundram

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
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65 year old woman with growing lesion on chin.


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Victor Delgado

Posted

It looks like kind of melanocytic lesion. Could be BAPoma.

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I see a dermal melanocytic lesion with some atypia. Could this be melanoma?

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Alex-Ventura-Leon

Posted

Dificult case (at least for me). Its a melanocitic intradermal proliferation with epiteliod features and some degree of atypia.

I think its benign. And i agree that it could be a BAPoma.

Waiting for the experts comments

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Not sure about both bapoma and melanoma. Some atypia in last fig. We don't see deepest component...It could be a deep penetrating nevus. 

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Uma Sundram

Posted

Difficult case and great comments. There is some atypia and it's always difficult with these partial biopsies in older individuals, to exclude melanoma. We had favored 'ancient change' within an inflamed nevus but recommended a re excision. The patient had had it for a long time but recently the lesion developed some erythema. BAP1 testing was normal.

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