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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 994 - 15th April 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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The patient is a 48 year old white woman with a punch biopsy of a 1 cm, brown, pink, irregular patch on the right hip area.

Case posted by Dr. Mark Hurt.


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Guest Romualdo

Posted

Melanoma in situ (pagetoid) arising in association with compound dysplastic nevus.

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Dr. Mona Abdel-Halim

Posted

Although the whole lesion is not removed (only punch biopsy), the left half is very different than the right half with pagetoid spread of atypical melanocytes and large confluent nests. The clinical is also worrisome. I will consider this as melanoma in situ developing within a nevus.

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Eman El-Nabarawy

Posted

Melanoma in situ developing in compound dysplastic nevus..

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Melanoma "in situ" in association with a compound nevus

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Robledo F. Rocha

Posted

Melanoma in situ with baloon cell features arising within a pre-existing nevus.

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Mark A. Hurt MD

Posted

My diagnosis was melanoma in situ in conjunction with a superficial congenital melanocytic nevus.

One might consider that the melanoma developed within the substance of the nevus, but there are actually 3 possibilities:[list]
[*]The melanoma arose from a melanocyte of the nevus
[*]The melanoma arose from a melanocyte in the nevus
[*]The melanoma arose from a melanocyte outside the nevus, and both nevus and melanoma in situ collided (or, more likely, the melanoma in situ collided with the nevus)
[/list]

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