Symptomatic thoracic epidural lipomatosis with syringomyelia: illustrative case

BACKGROUND: Spinal epidural lipomatosis is a rare but well-described disease. Here the authors present an extraordinary co-occurrence of spinal epidural lipomatosis with syringomyelia that did not improve after laminoplasty but required duroplasty as a definitive treatment. OBSERVATIONS: This is the seventh case in the literature describing a co-occurrence of spinal epidural lipomatosis and syringomyelia. The pragmatic argument for a causative relationship between 2 phenomena is syrinxes reduction after surgery for spinal epidural lipomatosis. Additionally, duroplasty for spinal epidural lipomatosis in the setting of syringomyelia has not previously been reported. Duroplasty offers much better reconstruction of the subarachnoid space as compared with extradural decompression surgeries. It is one of the treatment options for spinal epidural lipomatosis. Last, most of the patients described in the literature with secondary syringomyelia were women with diabetes mellitus. LESSONS: The co-occurrence of spinal epidural lipomatosis and syringomyelia is extremely rare. Neurological deficits in such cases respond well to surgical treatment. Accordingly, each case described in the literature resulted in syringomyelia reduction or resolution after surgery. Duroplasty may be necessary in selected cases of spinal epidural lipomatosis. Close follow-up and ongoing management of patients with epidural lipomatosis is therefore important.