The usual cause is a "derangement Painful Minor Intervertebral"(R. Maigne-painful intervertebral dysfunction), T11-T12, T12-L1, the most common. Exceptionally it may be a herniated disc, or severe disease The most common manifestation of this "syndrome dorso-lumbar hinge" is a low back pain that simulates all lumbosacral back pain or sacroiliac origin. It is the first manifestation of what we call the attention (1972). But it can also manifest as lower abdominal pain pseudoviscerales, or pain that simulate a trochanteric bursitis or, rarely, pain in pubic area. The usual cause is a "derangement Painful Minor Intervertebral" (R. Maigne - Painful intervertebral dysfunction), T11-T12, T12-L1, the most common. Exceptionally it may be a herniated disc, or severe disease (myeloma, metastasis ...) The most common manifestation of this "syndrome dorso-lumbar hinge" is a low back pain that simulates all lumbosacral back pain or sacroiliac origin. It is the first manifestation of what we call the attention (1972). But it can also manifest as lower abdominal pain pseudoviscerales, or pain that simulate a trochanteric bursitis or, rarely, pain in pubic area.