Published in

Karger Publishers, Ocular Oncology and Pathology, 4(6), p. 293-296, 2020

DOI: 10.1159/000504966

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Histopathological and Molecular Features of a Conjunctival Caruncular Deep Penetrating Nevus

This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

We describe the first presentation of a deep penetrating nevus (DPN) on the lacrimal caruncle. This lesion was seen in an 18-year-old woman presenting with hemorrhage of a long-standing pigmented mass on the caruncle. Histology showed a combined melanocytic neoplasm that consisted of two different melanocytic components. The differential diagnosis, based on histological examination, was a conventional melanocytic nevus, a Spitz nevus, or a combined melanocytic nevus. On the molecular level, one of the components revealed a mutation in the <i>CTNNB1</i> gene encoding the β-catenin protein, while both components harbored a BRAF V600E mutation, without molecular features of a malignant melanocytic lesion. This presentation of a DPN of the lacrimal caruncle emphasizes the similarities of the caruncle with the skin.