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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 264 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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Female 42 years, pigmented nodule on shin.
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Go to records June 2011

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Admin_Dermpath

Admin_Dermpath 1,217

Posted

Phillip McKee - Overseas consultations (Cave Creek, Arizona, USA) Wrote:

The clue to the correct diagnosis lies in the first image (upper left) where there is a spindled cell tumor interdigitating with the adjacent dermal connective tissue. The pigment is hemosiderin showing a rather golden hue. The lesion is a hemosiderotic fibrous histiocytoma. Well done to those who got the correct diagnosis

Submitted on 14/06/2011 14:34
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Marwa Fawzi - Dermatology Department, Faculty of Medicine, Cairo University (Egypt) Wrote:

Bednar tumor (pigmented DFSP)or hemosiderotic variant of DF.

Submitted on 14/06/2011 14:14
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Francisco Vilchez - Department of Dermatology. Virgen de la Victoria Clinical Universitary Hospital. (Málaga (Spain)) Wrote:

Blue Nevus, very atypical

Submitted on 14/06/2011 14:04
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MSMD - () Wrote:

early DF ("sclerosing hemangioma")

Submitted on 14/06/2011 11:35
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Marcela Saeb Lima - Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (Mexico City) Wrote:

As Juan Carlos I am inclined to think that the pigment is hemosiderin and that this could be DFSP or a hemosiderotic variant of DF

Submitted on 14/06/2011 11:21
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Juan Carlos Garcés - Hospital Oncológico / Hospital Luis Vernaza (Guayaquil Ecuador) Wrote:

Very difficult to me... I see storiform pattern so I was thinking in Bednar tumor (pigmentes DFSP). With high power I see an importan vascular component, and the pigment could be hemosiderin, so I am thinking in a vascular tumor too, perhaps hemangioendothelioma. Of course melanocytic lesion is a possibility

Submitted on 14/06/2011 10:14
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Eman El-Nabarawy - Cairo University (Egypt) Wrote:

Thought of malignant blue nevus.

Submitted on 14/06/2011 09:46
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Mona Abdel Halim - Dermatology Department, Faculty of medicine, Cairo University (Egypt) Wrote:

There are both spindled and large rounded epithelioid cells in addition to the melanin pigment and the melanophages. I can percieve considerable pleomorphism. Thought of malignant blue nevus.

Submitted on 14/06/2011 04:14
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