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Molecular profiling of a primary cutaneous signet‐ring cell/histiocytoid carcinoma of the eyelid
Author(s) -
Raghavan Shyam S.,
Clark Melissa,
Louie Christine Y.,
Jensen Kristin C.,
Dietrich Brian,
Beadle Beth Michelle,
ElSawy Tarek,
Baik Fred,
Kunder Christian A.,
Brown Ryanne A.
Publication year - 2020
Publication title -
journal of cutaneous pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.597
H-Index - 75
eISSN - 1600-0560
pISSN - 0303-6987
DOI - 10.1111/cup.13733
Subject(s) - pathology , signet ring cell , dermis , medicine , cytokeratin , eyelid , adenocarcinoma , immunohistochemistry , cancer , surgery
Primary cutaneous signet‐ring cell/histiocytoid carcinoma of the eyelid is a rare and aggressive neoplasm. Fewer than 50 cases have been reported in the literature, and the genetic driving mutations are unknown. Herein, we present a case of this rare disease along with the results of molecular profiling via targeted next‐generation sequencing. The patient is an 85‐year‐old man who presented with left eyelid swelling initially thought to be a chalazion. After no response to incision and drainage and antibiotics, an incisional biopsy was performed. Histopathologic sections revealed a proliferation of cells with signet‐ring and histiocytoid morphology arranged singly and in cords infiltrating the dermis, subcutaneous tissue, and muscle. The lesional cells strongly expressed cytoplasmic cytokeratin 7 and nuclear androgen receptor. Next‐generation sequencing revealed a CDH1 mutation, which is known to confer signet‐ring morphology in other carcinomas. Pathogenic mutations in NTRK3 , CDKN1B , and PIK3CA were also detected. To our knowledge, this is the first documented genetic analysis of this rare disease with findings that offer insights into disease pathogenesis and potential therapeutic targets.