A Case of Atypical Pituitary Adenoma in the Sellar Region

垂体腺瘤在影像上表现较为典型，囊性变较为常见，但大多在影像上可见囊液与实体肿瘤组织相间、混杂。本文报道一例鞍区全囊性病变，术前CT及MRI均只见囊变液，未见明显实体肿瘤，术前考虑垂体脓肿或Rathke囊肿，术中见囊实性病变，多数为肿瘤组织，术后病理检查诊断为垂体腺瘤。Pituitary adenomas typically exhibit characteristic imaging features, with cystic degeneration being relatively common. However, in most cases, imaging studies reveal an intermingling of cystic fluid and solid tumor tissue. This article reports a unique case of a purely cystic lesion in the sellar region. Preoperative CT and MRI demonstrated only cystic fluid without any evident solid tumor component. The initial preoperative differential diagnosis included pituitary abscess or Rathke’s cleft cyst. Intraoperatively, a cystic-solid lesion was identified, with the majority of the lesion being tumor tissue. Postoperative pathological examination ultimately confirmed the diagnosis of pituitary adenoma.