We report a case of retinoblastoma in an adult male without any family history. A 23-year-old man came to our hospital complaining of myiodesopsia in his right eye.
Funduscopic examination demonstrated a tumor on the periphery of the right fundus in the optic area.
Fine needle aspiration cytology revealed many clusters of small round cells and necrotic debris. Rosette-like formation was also present.
Immunocytochemical study of the smear showed that the tumor cells were positive for neuron-specific enolase (NSE) and synaptophysin. Extraction of the eyeball was performed and histological examination confirmed the presence of retinoblastoma.
