[A voluminous foraminal and extra foraminal disk hernia mimicking a tumor].

In some cases, disc herniation can be voluminous and can then constitute a differential diagnosis with tumours. We report the case of a 46 years-old female with sciatica and crural neuralgia which resisted to medical treatment. X-rays exams were normal, but the computerized tomography showed a voluminous mass in contact with the L5 nervous root and which was developed in the psoas major muscle. The MRI revealed a voluminous foraminal and extra foraminal herniation at the L4-L5 vertebral disc, extended up to the psoas major muscle and associated with an important inflammatory infiltration. Surgical treatment was successful with a follow up of 8 months.