Sciatic hernia causing sciatica: MRI and MR neurography showing entrapment of sciatic nerve

Sciatic hernia is a rare condition with diverse clinical manifestations. We report a case of sciatic hernia causing sciatica, in which the diagnosis made on CT was subsequently confirmed on MRI including magnetic resonance neurography. The salient clinical and imaging features and a brief review are presented.Sciatic hernia is a rare condition that can lead to bowel obstruction, sciatica, pelvic pain, back pain or ureteric obstruction 1, 2]. Clinical diagnosis of this condition is difficult. Ultrasonography and CT are the imaging modalities commonly used to diagnose sciatic hernia, although MRI can be used in cases in which entrapment of the sciatic nerve is suspected. Magnetic resonance neurography (MRN) provides high-resolution images to demonstrate entrapment of the nerve and morphological changes in the nerve 3]. Colour Doppler can be useful in surgical planning, as it can provide information regarding bowel viability.