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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 1046 - 26th June 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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A 70 year-old Hispanic male has reddish-brown macules and plaques lesions on the trunk and extremities. Initially, there were few lesions, but over the course of a year and a half, the lesions have increased in number and size.

Case posted by Dr. Hafeez Diwan.


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Old aged patient with a chronic course disease, macules and plaques, maybe compromising more than 10% total body surface (trunk and extremities). The clinical and histologic pictures are really that of Mycosis fungoides.

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Dr. Richard Carr

Posted

Must admit is was struck, at first glance, by the pale histiocyte-like cells and considered mastocytosis but after reading the other comments paid more attention to the hyperchromatic sezary cells. I think Hafeez might be showing us a PPD-like MF case though (with unusually prominent reactive histiocytes).

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dermpath1

Posted

I want to add Langerhans cell histocytosis to the dfferential.

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Dr. Hafeez Diwan

Posted

PPD-like mycosis fungoides.

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Dr. Richard Carr

Posted

Sorry I also meant to say LCH at first glance and not mastocytosis!!

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