Two patients with primary sellar leiomyomas, a rare entity

Leiomyomas are benign smooth muscle tumors commonly found in the genitourinary or gastrointestinal tracts. Rarely, they present as primary intracranial extra-axial brain tumors. Most of these lesions have been described in immunocompromised patients, but have been found very rarely in the immunocompetent patient. We present two patients with sporadic sellar leiomyomas. The first patient is a 25-year-old woman who presented with a 2-year history of amenorrhea and a heterogeneous lesion. The second is a 53-year-old man who presented with headaches and progressive panhypopituitarism, and a large cystic lesion expanding the sella. In both patients, transnasal transphenoidal surgery was performed for resection of the tumor. We review the intraoperative findings, neuropathology and immunohistochemistry and the clinical follow-up. A literature search, which revealed only two prior reported cases of sporadic sellar leiomyomas, and subsequent review led us to conclude that the natural history of sellar leiomyomas relates to the immune status of the patient and that these tumors may cause pituitary dysfunction through infiltration of the gland, mass effect and compression, or even potentially as a byproduct of prolactin secretion intrinsic to the tumor itself. Complete surgical resection of these infiltrating tumors may not be advisable when pituitary function is intact. Long-term endocrine follow-up in these patients is advised.