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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 2480 - 7 January 2020 Posted By: Uma Sundram

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
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20 year old female with 5 mm erythematous papule on left arm.

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Uma Sundram


I did not do a very good job of photographing this lesion, but there is a melanocytic proliferation in there. It is a subtle compound melanocytic nevus with overlying spongiotic changes, which I thought was good for a Meyerson nevus. With respect to vincenzo's comment, I guess if you see pigment, a regressing melanocytic lesion is a good thought as well. When I first saw the case, I did think of something inflammatory so lichen striatum is also a good thought.

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Krishnakumar subramanian


but lichen stratus is linear lesion. can it be a just papule

just for clarification

for me a benign spongiotic lesion with pigment incontinence and dense inflammatory cells May be LPP

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