[Synovial cysts of the lumbar interapophyseal joints. Apropos of 2 cases and review of the literature].

The authors report two cases of low back pains with sciatica caused by a synovial cyst of the interapophyseal joint of the lumbar spine. Analysis of only 23 cases found in the literature, point to their rarity, the lack of specific clinical signs, the importance of the CT scan for the diagnosis and the excellent results of surgical treatment.