CYCLIC SCIATICA - A MANIFESTATION OF COMPRESSION OF THE SCIATIC-NERVEBY ENDOMETRIOSIS - A CASE-REPORT

Study design. A case of cyclic sciatica secondary to ovarian cyst endo metriosis is presented. Objectives. To report the clinical description and magnetic resonance imaging aspects of cyclic sciatica. Summary of Background Data. Endometriosis of the sciatic nerve is rare, but must be included in the differential diagnosis of sciatic mononeuropathies . Methods. The authors report a new case of a woman whose cyclic sciat ica was caused by an ovarian cystic endometriosis lesion. Results. Mag netic resonance imaging was described as hyper- and hypointense on T1- weighted sequences, and hyperintense on T2-weighted sequences at the s ciatic notch. Conclusion. Magnetic resonance imaging may permit a spec ific diagnosis of this unusual cause of sciatica by showing a hemorrha gic mass in the region of the sciatic nerve. Early recognition is nece ssary to prevent permanent damage to the sciatic nerve.