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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 2708 - 23 November 2020 Posted By: Iskander H. Chaudhry

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
Submitted Date :
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79F, Right upper back - shave biopsy. 10x12mm, pink dome shaped lesion.


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Palisaded encapsulated neuroma ( it seems multiple, but it’s probably a multilobated growth ). 

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Krishnakumar subramanian

Posted

agree with PEN because of the clefting in image 2

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Dr. Richard Carr

Posted

Favour plexiform schwannoma. EMA staining can help define the perineurium (expected capsule in schwannoma). These are not necessarily neurofibromatosis associated (unlike plexiform neurofibroma which pretty much only occur in NF1 - they are also fully encapsulated by perineurium but have myxoid component).

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Iskander H. Chaudhry

Posted

Thanks Richard and for all the other comments. Yes the diagnosis was plexiform schwannoma. 

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