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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 1280 - 20 May Posted By: Guest

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
Submitted Date :
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35 year-old female with biopsy of rash on arm.

Case posted by Dr Hafeez Diwan
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Go to records May 2015

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Dr. Mona Abdel-Halim

Dr. Mona Abdel-Halim 508

Posted

Irregular psoriasiform hyperplasia with mild spongiosis, focal parakeratosis, extravasated erythrocytes with RBCs in the epidermis (last image). A hint of vcuoar degeeration is also deteced as well as ome plasma cells. I think clinicopathological correlation is important here. I would think first in pityriasis rosea or pityriasiformru reaction.

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Guest Romualdo

Guest Romualdo

Posted

In the first image there is perifollicular (upper left corner) and perieccrine inflammatory infiltrate. If this rash is limited to the arm and clinical findings are supportive I think this could be lichen striatus.

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IgorSC

IgorSC 119

Posted

Mt first thought was Pityriasis rosea too. Pigmented purpuric dermatosis is another differential diagnosis. Clinical correlacion is important.

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Guest
I second pItyriasis rosea, although the site is unexpected.

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Guest Romualdo

Guest Romualdo

Posted

Dr. Hafeez, I would be very grateful if you could answer this question. The rash was limited to the arm or was it disseminated, and the arm was only the site chosen for biopsy? My english is not very good and I understood that it was limited to the arm, so my wrong suggestion of lichen striatus.

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