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?

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Case Number : Case 1923 - 12 Oct - Dr Richard Carr Posted By:

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
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M85. Ear. C&C BAK/SCC?

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vincenzo polizzi

Posted · Report

What about a SK(irritated variant), with some bowenoid change(last pic)?

Ok there is an insistent ductal differentiation...but my impression is of a follicular/follicle-sebaceous type, and am not able to understand what does it means.

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Dr. Mona Abdel Halim

Posted · Report

Hybrid seb K and poroid lesion (suspecting early porocarcinoma changes)

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Dr. Richard Carr

Posted · Report

I called it seborrheic keratosis and poroma/hidradenoama (poroid type). I did not think there were features to indicate malignancy. The two lesions, although clearly abutting, seemed quite distinct morphologically but it is interesting that SEBK has been seen on a number of occasions (by myself) in combination with porocarcinomas. I guess it could still be coincidence with SEBK being such a common lesion but does make me wonder. I've always considered SEBK to be infundibular origin rather than acrosyringeal based on their lack of occurrence on glabrous (non-hair bearing sites) skin.

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