Open AccessCase of a Giant Conjunctival Melanocytic Nevus
Author(s) -
Hayato Mori,
Kanji Takahashi
Publication year - 2020
Publication title -
ocular oncology and pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 10
eISSN - 2296-4681
pISSN - 2296-4657
DOI - 10.1159/000508891
Subject(s) - medicine , histopathological examination , pathology , malignancy , melanoma , immunohistochemistry , h&e stain , conjunctiva , nevus , melanocytic nevus , dermatology , cancer research
A 78-year-old female experienced extraocular extension of a giant conjunctival melanocytic mass. The clinical diagnosis was conjunctival malignant melanoma. We performed local excision and histopathological examination. The result of hematoxylin-eosin staining disclosed multiple intralesional mucosal cysts and nevus cell nests with abundant melanin. Immunohistochemical examination revealed expression of S-100, melan-A, and HMB-45 and no expression of Ki-67. Histopathological examination showed no evidence of malignancy. Giant conjunctival melanocytic nevi can be diagnostically confused with conjunctival malignant melanoma.