Abstract
Two benign acquired melanocytic lesions of the iris stroma had distinctive clinical and pathologic features. One tumor was loculated and polypoid, suggesting ectopic glandular tissue, while the other was a flat tumor with a rich surface capillarity. Both lesions histologically were composed of mononucleated, binucleated, and multinucleated hypopigmented epithelioid and elongated "myoid" cells, widely separated in a finely fibrillar eosinophilic stroma. The ultrastructural features of one case included hyperconvoluted nuclei, conspicuous cytoplasmic filaments are rare, filamentary-striated (leptomeric) structures, scant organelles and inclusions except for numerous mitochondria and glycogen granules, small and infrequent melanosomes, and a fibrillary extracellular matrix focally organized into banded basement membrane material.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call