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Oncocytic cyst of the larynx: a rare finding. A 75-year-old woman presented with an 18-month history of severe, slowly worsening dysphonia. She was a smoker and known to have multiple benign cystic thyroid lesions. She reported no associated symptoms and other medical and social history was unremarkable. Fibreoptic nasendoscopy revealed a right-sided supraglottic cyst appearing to arise from the right false vocal cord. Further bedside examination was unremarkable. She underwent microlaryngoscopy and biopsy which showed a cyst originating from the right anterior ventricle, successfully removed without rupture using cold steel. Formal histopathology revealed a 14×10×7 mm unilocular, completely excised cyst lined by oncocytic epithelium and composed of columnar cells with darkly stained nuclei and abundant granular, eosinophilic cytoplasm. Three weeks postoperatively the patient's voice had returned to normal. To date, 11 months postoperatively, there is no evidence of recurrence, and she will continue long-term follow-up.