A very rare case: superior rectus intramuscular orbital adnexal lipoma.

Abstract

Lipomas are common benign mesenchymal tumors, often found in the subcutaneous plane. Deeper lipomas situated in intramuscular or retroperitoneal locations are seen less frequently. Orbital lipomas are sporadic, with an incidence varying from 0% to 11%, whereas extraocular muscle lipoma is rare and accounts for only 0.6%. Despite their infiltrative nature and tendency to recur locally, intramuscular lipomas do not have malignant potential. A review of literature revealed only four cases of extraocular muscle lipomas worldwide. Through this paper, we report an indolent case of superior rectus lipoma and its presentation, appearance, histopathology, differential diagnosis, and management.