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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 1095 - 3rd September 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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29 year-old male with biopsy of a back lesion.

Case posted by Dr. Hafeez Diwan.


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Dr. Mona Abdel-Halim

Posted

I think there is a stringy basophilic material in the last two figures between collagen bundles, could it be interstitial form of GA or interstitial granulomatous dermatitis, other causes of busy dermis.

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Arti Bakshi

Posted

Difficult!...agree with both of the above possibilities (although they are usually not differntials of each other!) Image 3 does have some slit like spaces with RBCs, so probably favour Kaposi's...Would do immunos to better define the nature of the spindle cells and need more clinical info.

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Guest Romualdo

Posted

I think there are subtle findings that may suggest Kaposi sarcoma:
1. In figure 1 there are some foci where spindle cells seem to concentrate, for example in middle bottom of this figure, around a pilous follicle.
2. Some extravasated red blood cells are seen in figure 2
3. Spindle cells with slightly atypical nuclei are seen in figures 3 and 4

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