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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 2624 - 28 July 2020 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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34 year old male with chest lesion.


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Krishnakumar subramanian

Posted

multifocal basaloid proliferation with a cracking artifact seen in image 1 ? Superficial spreading BCC

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Cem Leblebici

Posted

I think this lesion has a specific follicular stroma, therefore it may be more accurate to call it trichoblastoma. Due to multifocality, It resembles trichoblastoma arising in nevus sebaceous, although there are no signs of nevus sebaceous in this biopsy.

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Nevus Sebaceous with follicular induction. 

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Richard Logan

Posted

I was struck by the very high-lying sebaceous glands which I presume indicates a naevus sebaceous, although of course the trunk is an uncommon site.  I think the basaloid downgrowths are multifocal superficial BCC.  There appears to be a retraction artefact visible on the left of images 1 and 2.

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Dr. Mona Abdel-Halim

Posted

My first thought is superficial BCC (there is a retraction artefact in images 1,2)

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Uma Sundram

Posted

Superficial BCC. We thought the BCC was associated with some sebaceous differentiation, bit did not think this was nevus sebaceus, due to the morphology and the site. We did not favor sebaceous carcinoma, although that thought crossed our mind.

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Ok. I was wrong with nevus sebaceous. Interesting case. Thanks Uma!

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Dr. Richard Carr

Posted

I don't think you were wrong! Superficial BCC-like trichoblastoma. Probable naevus sebaceous associated (would need a history of a pre-existing lesion). CK20 & CD10 can be useful adjuncts.

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