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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 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.
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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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Dr. Mona Abdel-Halim

Posted

Onychomatricoma is my thought too

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Richard Logan

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

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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