Conjunctival Stromal Tumor: Expansion of Findings in a Newly Described Entity

Conjunctival myxoma is a rare benign tumor that accounts for <0.001% of conjunctival lesions.1 It is important to recognize this entity, because it might be associated with cardiac myxoma, which can be life threatening.2 Based on a series of 4 cases, Herwig et al2 recently described the new entity, the conjunctival stromal tumor (COST), with its name deduced from the well-known gastrointestinal stromal tumor, showing a partially similar immunomarker profile. Positive markers for COST include CD34, vimentin, and partially for CD68; negative markers include S100 and smooth muscle actin.