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 2131 - 9 August 2018 Posted By: Raul Perret

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
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70 year old male with a 28 mm lesion on the hand.

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Angiomatoid fibrous histiocytoma usually has a fibrous capsule and is associated with a dense lymphoplasmacytic infiltrate so that it sometimes looks like a lymph node under low power.

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Raul Perret


I called this a vascular malformation with areas of thrombosis. The blood vessels have thick walls and a haphazad arrengement. The spindle cells are reactive probably due to recanalization of the thrombus. No vacuolated pseudoadipocytic cells were seen either (typically seen in spindle cell hemangioma)

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