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 2089 - 8 June 2018 Posted By: Dr. Richard Carr

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
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M55. Recurrent scalp lesion.

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Anil Patki

Posted

Nodular BCC with amyloid and calcification

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vincenzo polizzi

Posted

Poroid hydradenoma, with some atypical feature. But without any substantial findings of malignancy. 

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Guillermo García

Posted

Pigmented trichoblastoma
 

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Anil Patki

Posted

I opted for BCC because it's recurrent and shows deposits of amyloid and calcification.

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vincenzo polizzi

Posted

I opted for poroid hidradenoma because this tumor looks like a poroma but without epidermal connection ( it’s in essence a poroma ). The necrosis “en masse” is a clue for poroma. 

The bcc shows usually a cleft between epithelium and stroma...here the clefts are stroma-to-dermis

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Raul Perret

Posted (edited)

I also thought of poroma family of tumors. If you want to call it poroid hidradenoma it would not bother me, bottom line this looks benign

Edited by Raul Perret

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Dr. Richard Carr

Posted

Thanks for the responses. Apologies for delay. I called it a solid cystic (poroid) hidradenoma, focal areas of necrosis, calcification and pigmentation.

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