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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 2635 - 12 August 2020 Posted By: Dr. Hafeez Diwan

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
Submitted Date :
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30 year-old male with brownish left ring fingernail lesion. (photos courtesy of Dr. Sarah Al-Awami).
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Go to records August 2020

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Dr. Mona Abdel-Halim

Dr. Mona Abdel-Halim 508

Posted

Onychomatricoma is my thought too

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Richard Logan

Richard Logan 0

Posted

Other than onychomatricoma I don't know any other diagnosis that could explain the multiple parallel epithelial layers seen so beautifully here.  They look like a fine tooth comb!

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Dr. Hafeez Diwan

Dr. Hafeez Diwan 125

Posted

I called this onychopapilloma. It has premature keratinization. I think of onychomatricoma as a fibro-epithelial proliferation with both stromal and epithelial components.

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