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In this section we have spot diagnoses posted on a daily basis since June 2010, now over 4000! You can review the archived cases and read the suggested diagnoses by users and the final comment by the contributors.
Case are uploaded each week day by 10 am UK time with the correct diagnosis will generally be posted at 8 pm UK time. Why not view the most recent spot diagnosis and proffer a diagnosis?

Case Number : Case 2467 - 31 December 2019 Posted By: Uma Sundram

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33 year old female with perianal, slowly growing nodule

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Just to add that some time it is difficult to differentiate Hidradenoma papilliferum from  neoplasms with apocrine differentiation such as tubular apocrine adenoma, syringocystadenoma papilliferum, and apocrine cystadenoma (apocrine hidrocystoma).

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Uma Sundram


Hidradenoma papilliferum.  Agree with dermpath1's comments, however. 2 unusual things about this case. 1. The presence of obvious apocrine differentiation/metaplastic change. 2. Perianal location. Happy New Year to all!

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