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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.
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Case Number : Case 2368 - 18 July 2019 Posted By: Iskander H. Chaudhry

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Left shoulder - excision biopsy with 2mm margin - GP scraps intradermal naevus however no histology for this. Noticed a week ago.

Edited by Admin_Dermpath


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An atypical and asymmetrical melanocytic lesion is always worrying, given the possibility of melanoma.porliferation

However the finding of a trilayered pattern, combining a deep ordinary dermal nevus, surmounted by a scar as intermediate layer, and a junctional atypical melanocytic proliferation. The last one doesn't expand beyond the damaged traumatized underneath dermis, and the cellular atypia isn't exorbitant. So I think this is an example of Recurrent\Persistent Nevus(aka pseudo melanoma).

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2 hours ago, vincenzo said:

An atypical and asymmetrical melanocytic lesion is always worrying, given the possibility of melanoma.porliferation

However the finding of a trilayered pattern, combining a deep ordinary dermal nevus, surmounted by a scar as intermediate layer, and a junctional atypical melanocytic proliferation. The last one doesn't expand beyond the damaged traumatized underneath dermis, and the cellular atypia isn't exorbitant. So I think this is an example of Recurrent\Persistent Nevus(aka pseudo melanoma).

Perfect description. Recurrent nevus

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Admin_Dermpath

Posted

Dear all thank you for this. It does now features of a recurrent naevus, with the architectural atypia lying within the scar area; however, it is important to compare with the original which once located was found to be benign! 

Iskander 

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