本文描述一病人以食欲障碍开始,诊断为神经性厌食,最后确诊为松果体瘤侵袭下视丘.虽然理论与实际均证明下视丘与食欲调节有关,只有数例报告下视丘功能不良时首先表现行为障碍.本例在早期发展阶段很难区分是情感性还是器质性.患者有行为异常但无神经系统或内分泌方面的缺欠.异位松果体瘤虽很少见,但患者表现与神经性厌食很相似,所以导至误诊. This article describes a patient starting with an appetite disorder, diagnosed with anorexia nervosa, and finally diagnosed with pineal tumor invasion of the hypothalamus .Although the theory and practice have proved that the hypothalamus and appetite regulation, only a few cases of hypothalamic dysfunction When the performance of the first behavioral disorders in this case in the early stages of development is difficult to distinguish between emotional or organic patients with abnormal behavior but no neurological or endocrine shortcomings ectopic pineal tumors are rare, but patients Performance and anorexia nervosa are very similar, so lead to misdiagnosis.