Congenital Orbital Fibrosis With Spontaneous Regression of Orbital Tumor.

Congenital orbital fibrosis (COF) is a rare disorder characterized by an infiltrating orbital mass with secondary involvement of the extraocular muscles that may present with extraocular muscle dysfunction, and globe and eyelid abnormalities in infancy. This condition is thought to be a nonprogressive process and literature on longitudinal assessment of COF is limited. The authors describe a case of COF which was followed for 15 years. The patient had stable symptoms of ocular dysmotility and ptosis but was noted to have spontaneous regression of the orbital mass on serial MRI.