[Axial osteomalacia. Comparative analysis with fibrogenesis imperfecta ossium (author's transl)]

Axial osteomalacia is an infrequent osseous disease, etiopathogeny of which is yet unknown. The authors report three cases of such affection and two cases of fibrogenesis imperfecta ossium. They stress the clinical, biological and radiological specific signs of these diseases. Biopsy is necessary for diagnose some doubtful cases, especially in order to exclude other causes of osteomalacia as fibrogenesis imperfecta ossium. The latter osteopathy which frequency may be underestimated has often similar radiological data.