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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 2147 - 31 August 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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M45. Rash. ?GA, ?Sarcoid, ?Other
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Edited by Admin_Dermpath

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dermpath1

Interstitial granulomatous dermatitis (IGD).You may see  ('floating sign') .

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Dr. Richard Carr

Dr. Richard Carr 622

Posted

I reported it as in keeping with granuloma annulare (incomplete type) with subtle granuloma-like collections. We've discussed previously that there are rare case reports of patients with both GA and sarcoid. I probably mentioned this in reporting the case. There was a picture of a similar case, brought to my attention by Dr Saleem Taibjee, pictured in Akerman's original classic (gold) book "Histologic diagnosis of Inflammatory Skin Diseases". The image did not re-appear in the subsequent 2nd Silver or 3rd Gold/Silver editions.

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