Optic Nerve Sheath Calcification

Abstract

A 72-year-old man underwent computed tomography to evaluate upper airway congestion. Imaging revealed the incidental findings of calcification in each optic nerve sheath (Fig A, B) and the falx cerebri (Fig B, arrow). The patient had undergone a parathyroidectomy 5 years prior for primary hyperparathyroidism. His serum calcium levels subsequently remained within normal limits. Examination showed no evidence of optic nerve dysfunction, although there was asymmetric optic disc cupping (Fig C, D). Optic nerve sheath calcification may lead to optic atrophy with reduced visual acuity or remain asymptomatic, as in our patient (Magnified version of Fig A-D is available online at www.aaojournal.org).