Preoperative VA, mid-hole diameter, and base-hole diameter are correlated with anatomic success in MH surgery. An excellent surgical prognosis exists for MHs with mid-hole diameter less than 500 microns and base-hole less than 1,000 microns.

Therapeutic, IV.

A 17-year-old Caucasian man presented with an enlarging, painless mass causing a bulge in the lateral aspect of the left upper eyelid. An MRI demonstrated a well-circumscribed lacrimal gland mass without bony erosion. A 1-cm lacrimal gland mass was excised. The morphology and immunohistochemical findings were supportive of a soft tissue perineurioma. To the authors' knowledge, they present the first case report of a soft tissue perineurioma involving the lacrimal gland.