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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 4432 - 16 January 2024 Posted By: Admin_Dermpath

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
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A 23-year old gentleman with a reported long history of an asymptomatic persistent plaque that began on his left medial ankle after a traumatic injury to this area. One year later, he developed larger plaques on his right thigh and left hip with the reported history of positive culture for mycobacterium gordonae, the clinical diagnosis was a granulomatous dermatitis with possible infectious etiology

Contributor: Dr. Phyu P. Aung
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Go to records January 2024

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vincenzo

Granulomatous non caaseating lesions ?AFB ?Mycobacterium Gordonae infection ( never seen a case before ). 

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Admin_Dermpath

Admin_Dermpath 1,217

Posted

Thank you for your comments. 

The final diagnosis is: Granulomatous mycoses fungoides

The differential diagnoses to consider are:

Granulomatous dermatitis due to infection.
Xanthogranuloma.
Granuloma annulare.
Necrobiosis lipoidica.

I have uploaded the immunochemistry of this case also.

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