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In this section we have spot diagnoses posted on a daily basis since June 2010, now over 4000! You can review the archived cases and read the suggested diagnoses by users and the final comment by the contributors.
Case are uploaded each week day by 10 am UK time with the correct diagnosis will generally be posted at 8 pm UK time. Why not view the most recent spot diagnosis and proffer a diagnosis?

Case Number : Case 1383 - 12 October Posted By: Guest

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
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70 years male; 4 cm mass in the subcutis of left shoulder

Case posted by Dr Iskander Chaudhry

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Guest Romualdo


I think there are very few large, basophilic, ganglion-like cells. Another possibility is intramuscular nodular fasciitis, a related lesion.

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Iskander H. Chaudhry


Well done everyone for the correct diagnosis. This is not a common lesion we will find in our routine dermatopathology however you all made the correct diagnosis because the features are very distinctive.

The final diagnosis reported is Proliferative fasciitis/ proliferative myositis.

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