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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 341 Posted By: Guest

Please read the clinical history and view the images by clicking on them before you proffer your diagnosis.
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Male 76 years, tumor on arm.
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Go to records September 2011

User Feedback


Admin_Dermpath

Admin_Dermpath 1,217

Posted

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

Merkel cell carcinoma is the correct diagnosis although immunohistochemistry is obviously necessary to confirm it. Two tumors which should be particularly excluded are small cell melanoma and T-cell lympomas since Merkel cell carcinoma sometimes shows epidermotropism.

Submitted on 29/09/2011 14:53
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Marwa Fawzi - Dermatology Department, Faculty of Medicine, Cairo University (Egypt) Wrote:

1st impression is Lymphoma with vascular destruction &grenz zone for immunos.

Submitted on 29/09/2011 11:14
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Marie MD - () Wrote:

MCC (primary vs. met) vs. lymphoma. Though usually not in this age group, PNET

Submitted on 29/09/2011 10:16
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Eman El-Nabarawy - Cairo University (Egypt) Wrote:

Malignant small blue cell tumor. MCC vs. Metastatic small cell lung carcinoma for browen stains.

Submitted on 29/09/2011 10:12
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Mona Abdel Halim - Dermatology Dept. Faculty of Medicine, Cairo University (Egypt) Wrote:

Malignant small blue cell tumor. MCC vs. Metastatic small cell lung carcinoma. Will ask for CK7, CK20, NSE, chromogranin, synaptophysin and TTF-1.

Submitted on 29/09/2011 10:01
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Pablo Ortega - "Isidro Ayora" Hospital (Loja-Ecuador) Wrote:

Merkel Cell Carcinoma vs metastatic small cell carcinoma to the skin

Submitted on 29/09/2011 08:04
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Marcela Saeb Lima - INCMNSZ (Mexico City) Wrote:

small blue cell malignant neoplasm: Merkel Cell carcinoma vs lymphoma vs neuroendocrine ca

Submitted on 29/09/2011 07:53
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Bostjan Luzar - Institute of Pathology, Medical Faculty University of Ljubljana (Ljubljana, Slovenia) Wrote:

Undoubtedly malignant tumor. My first impression is neuroendocrine tumour. Either primary in the skin, or a metastasis (?lung).

Submitted on 29/09/2011 06:44
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