Intramuscular hemangioma of skeletal muscle is common within systemic sites but very rare within extraocular muscle. We describe a patient with an enlarged inferior oblique who harbored such a lesion.
A healthy 25-year-old man noted a gradually painless left lower eyelid mass of 1 year’s duration. He denied diplopia and blurred vision. Best-corrected visual acuity was 20/20 OD and 20/25 OS. There was left hyperglobus with a firm, mobile, nontender mass palpable through the left lower eyelid (Figure 1A). While versions appeared full, diplopia could be elicited in downgaze and left gaze. Exophthalmometry showed 1 mm of proptosis in the left eye. No other ocular abnormalities were noted.
Charles NC, Belliappa S, Patel P. Intramuscular Hemangioma of the Inferior ObliqueA Rare Cause of Extraocular Muscle Enlargement. JAMA Ophthalmol. 2014;132(1):122-124. doi:10.1001/jamaophthalmol.2013.6079