[Fractures caused by bony insufficiency of the sacrum. Clinical, radiographic, scintigraphic and x-ray computed tomographic symptomatology].

Fracture of sacrum due to bone deficiency is not a rare lesion and must be considered as a possible differential diagnosis of unexplained pelvic region pain. The various clinical semeiology elements are discussed in relation of 20 cases, together with circumstances of onset, enabling definition of a population at risk: elderly women with a bone metabolic disorder and/or a congenital or acquired architectural anomaly. Radiographic, scintigraphic and CT scan images are sufficiently characteristic for these non-invasive exploratory procedures to provide an exact diagnosis and the possibility of early treatment.