Ultrasonography of sciatic nerve endometriosis.
We describe the ultrasonographic findings of sciatic nerve endometriosis.



Two premenopausal women with catamenial sciatica symptoms were examined, the first without a history of endometriosis, the second with previously confirmed endometriosis of the ovary. Ultrasonography, extending from the sciatic notch to the level of the ischial tuberosity showed that the sciatic nerve was "engulfed" in a large, perineural, hypoechogenic, inhomogeneous lesion with an irregular contour corresponding to an endometrioma. The nerve was enlarged, but it was discernible within the lesion, except at its most cranial part. MRI of the pelvis showed intrapelvic extension in both patients.



The first patient was treated with a gonadotropin-releasing hormone agonist, leading to complete morphological regression and normalization of nerve structure, parallel with symptomatic resolution.



These cases illustrate that ultrasound is a feasible imaging modality for sciatic nerve endometriosis that may even be used to monitor morphological regression of endometrial tissue during treatment. Muscle Nerve 54: 500-505, 2016.
MTA-SE NAP B Peripheral Nervous System Research Group, Department of Neurology, Semmelweis University, Balassa u. 6, Budapest, Hungary, 1083.
Zsuzsanna
Z
Arányi
Department of Radiology, University of Szeged, Szeged, Hungary.
Ilona
I
Polyák
Department of Neurology, Szent Kereszt Hospital Kalocsa, Hungary.
Norbert
N
Tóth
Department of Gynecology and Obstetrics, Medical Centre, Hungarian Defense Forces, Budapest, Hungary.
Gábor
G
Vermes
Department of Neurology, Szent Kereszt Hospital Kalocsa, Hungary.
Zsuzsanna
Z
Göcsei
D004576:Electromyography; D004715:Endometriosis / Q000000981:diagnostic imaging*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D012189:Retrospective Studies; D020426:Sciatic Neuropathy / Q000000981:diagnostic imaging*; D014463:Ultrasonography
GnRH agonist; catamenial sciatica; endometriosis; sciatic nerve perineural spread; ultrasonography