A 70-Year-Old Man With Diplopia, Nausea, and Vomiting

A 70-year-old man who presented with diplopia was found to have an intrasellar unilocular cyst lined by ciliated columnar epithelium. The cyst showed suprasellar extension and measured 3 cm in greatest dimension. The intrasellar part of the cyst wall contained a pituitary adenoma. These findings are characteristic of Rathke cleft cyst with concomitant pituitary adenoma, an entity that must be distinguished from other intrasellar and suprasellar lesions.