ラトケ嚢胞の破裂により生じた二次性汎下垂体炎の1例

Secondary Pan-hypophysitis Caused by Rupture of Rathke's Cleft Cyst:Case Report

Ⅰ．はじめに

　一般的にリンパ球性下垂体炎はリンパ球浸潤を主体とする下垂体の慢性炎症疾患で，主として妊娠・分娩を契機に発症するといわれている．

　今回われわれは，ラトケ嚢胞の破裂によって生じ，臨床的に興味深い経過をたどった下垂体炎を経験したので報告する．

We report a case of secondary hypophysitis caused by rupture of Rathke's cleft cyst. A 30-year-old woman was ad-mitted to our hospital with complaints of polyuria and left visual acuity impairment. These symptoms were preceded by aseptic meningitis one month prior to admission. An MRI on admission showed a suprasellar cystic mass and a swelling pituitary stalk. The mass was partially resected via the transsphenoidal approach. Pathological diagnosis was adeno-and neuro-hypophysitis and ruptured Rathke's cleft cyst. These findings strongly suggested that the hypo-physitis was caused by rupture of Rathke's cleft cyst.