[Unusual case of hypercondensing malignant osteodysplasty: osteopetrosis].

Osteopetrosis, known also as Albers-Schonberg disease, is a genetic disorder causing a generalized sclerosis of the bones and the reduction of the marrow. The diagnosis is often secondary to pathologic processes and its usually observed through specific X-ray researches. The principal cause of osteopetrosis is to attribute to a deficit of bone resorption and remodelling. Osteomyelitis is a complication of osteopetrosis. The purpose of this article is based on several point: 1) to know the cause of osteopetrosis, then to classify and check it; 2) to present the case who did not respond to of a patient with osteopetrosis complicated by maxillary and phalanx osteomyelitis common therapies and give an accurate analysis.