Primary Lacrimal Gland Oncocytoma Associated With Hypervascularity: A Case Report With Imaging and Immunohistochemical Characterization.

Oncocytoma is a rare benign neoplasm with few cases reported to involve the orbit. When affecting the orbit, oncocytomas have very slow growth and often evade early diagnosis. The diagnostic evaluation of these orbital tumors is not fully understood. The authors present a case of a benign oncocytoma arising in the lacrimal gland associated with significant vascularity and intraoperative bleeding. The authors provide immunohistochemical analysis of this rare orbital tumor and insights in surgical planning.