J Korean Ophthalmol Soc.  2020 Aug;61(8):955-959. 10.3341/jkos.2020.61.8.955.

A Conjunctival Myxoid Stromal Tumor

• Kim HK
• Jang SK
• Choi KU
• Lee JS

• KMID: 2505317
• DOI: http://doi.org/10.3341/jkos.2020.61.8.955

Abstract

Purpose
We report a conjunctival myxoid stromal tumor (CMST), which is a rare benign conjunctival mass.
Case summary
A 70-year-old man with a history of hypertension and cerebral infarction visited our hospital with a clear mass ofthe conjunctiva in the left eye. His visual acuity was normal, and no other abnormal findings were noted. A transparent, yellowish,jelly-like, 4 × 3 mm mass with a clear border between it and the surrounding tissue was found at the lower temporal part of theconjunctiva. The mass was mobile and there was no pain or tenderness. Excisional biopsy was performed on the mass.Histopathological examination showed reticular fibers located in an abundant mucus-like matrix with fusiform, astrocytic andscattered inflammatory cells. Immunologic examination revealed CD34 positive and SMA negative findings and we diagnosedthe mass as a CMST.
Conclusions
When there is a clear pale yellow to light pink mass with a clear border and a distinct vascular distribution or pigmentationin the conjunctiva, the possibility of a CMST must be considered. Histopathologic and immunologic examinationshould be performed through biopsy and evaluation for systemic disease should be performed as necessary.

Keyword

Conjunctival myxoid stromal tumor; Conjunctival stromal tumor; CD34; Mucoid