Uveal Melanoma and Paraneoplastic Perivascular Dermal Melanocytic Proliferation in the Setting of Bilateral Diffuse Uveal Melanocytic Proliferation: The Potential Role of the Hepatocyte Growth Factor/c-Met Axis in Their Pathogenesis.
Bilateral diffuse uveal melanocytic proliferation
Hepatocyte growth factor
Paraneoplastic dermal melanocytic proliferation
Uveal melanoma
c-Met
Journal
Ocular oncology and pathology
ISSN: 2296-4681
Titre abrégé: Ocul Oncol Pathol
Pays: Switzerland
ID NLM: 101656139
Informations de publication
Date de publication:
Dec 2021
Dec 2021
Historique:
received:
23
07
2021
accepted:
22
08
2021
entrez:
28
1
2022
pubmed:
29
1
2022
medline:
29
1
2022
Statut:
ppublish
Résumé
Two patients, with non-small cell lung carcinoma treated with pembrolizumab, developed bilateral diffuse uveal melanocytic proliferation (BDUMP) with interesting histopathological features. The first patient developed a right ciliary body mass concurrently with BDUMP. The globe was enucleated. The ciliary body mass was a mitotically active epithelioid uveal melanoma, invading the trabecular meshwork and peripheral corneal stroma, with over 90% of the cells expressing Cyclin D1 protein. The melanoma showed no chromosome 3 or 8 changes. The background uvea showed diffuse, bland spindle cell melanocytic proliferation with much lower Cyclin D1 expression (around 10%). In the choroid, this population was punctuated by islands of pigmented epithelioid cells, some of which were necrotic. All these islands expressed a high level of Cyclin D1, and some islands expressed nuclear preferentially expressed antigen in melanoma (PRAME). The ciliary body mass, epithelioid cell islands, and the BDUMP all expressed c-Met (the receptor for hepatocyte growth factor [HGF]). The features were those of ciliary body melanoma and choroidal melanoma "tumorlets," developing on a background of BDUMP. The second patient developed bilateral periocular skin pigmentation following a diagnosis of BDUMP, which when biopsied, showed dermal islands of paraneoplastic perivascular melanocytic cell proliferation. These cells also expressed c-Met protein. These observations implicate the HGF/c-Met axis in the pathogenesis of BDUMP, the uveal melanomas in the ciliary body and choroid in the first patient and the paraneoplastic dermal melanocytic proliferation in the second patient.
Identifiants
pubmed: 35087819
doi: 10.1159/000519177
pii: oop-0007-0418
pmc: PMC8740289
doi:
Types de publication
Journal Article
Langues
eng
Pagination
418-427Informations de copyright
Copyright © 2021 by S. Karger AG, Basel.
Déclaration de conflit d'intérêts
The authors have no conflicts of interest to declare.
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