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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 2664 - 22 September 2020 Posted By: Iskander H. Chaudhry

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
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53F, Right elbow excision. Exophytic nodule. ?KA

Edited by Admin_Dermpath


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Epidermal induction and collagen trapping suggest a dermatofibroma

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9 hours ago, Anil Patki said:

Epidermal induction and collagen trapping suggest a dermatofibroma

Agree

 

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On 23/09/2020 at 05:42, vincenzo said:

How about Kaposi’s Sarcoma?

brilliant call, my thoughts exactly .

 

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Admin_Dermpath

Posted

The above case is updated with some immunostains.

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An atypical cutaneous leiomyoma ( aka primary cutaneous leiomyosarcoma ). I was off road. 

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Meenakshi Batrani

Posted

Agree with atypical intradermal smooth muscle neoplasm

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Admin_Dermpath

Posted

Dear All 

We struggled with this case as the Desmin was convincing and whilst it can be seen within Cellular DF it is not usually diffuse and strong. We therefore went for an atypical smooth muscle tumour.  

Dr Iskander H. Chaudhry 

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Dr. Richard Carr

Posted

I'd suspect this is a dermatofibroma and also suspect I wouldn't have done IHC. 

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