Large meningoencephalocele after orbital decompression

A 71-year-old woman with a history of thyroid eye disease was seen for evaluation of a skull-base mass noted on neuroimaging. She had previously under-gone bilateral orbital decompressions and strabismus surgery and had no neurologic symptoms. Bony defects along the skull base and cerebrospinal fluid leaks are known risks of orbital surgery. This is the first report of a large, asymptomatic meningoencephalocele after orbital decompression surgery.