[Osteogenesis imperfecta with hypertrophic callus. Apropos of 2 cases with early onset].
BACKGROUND
The callus that forms at the site of recent fractures in patients with osteogenesis imperfecta is usually normal, but hyperplastic callus may develop.


METHODS
Case 1. A hyperplastic callus with local inflammation developed at the site of a fracture of the left thigh of a boy, aged 11 months suffering from osteogenesis imperfecta. This disease was characterized by the progressive development of broad limbs, bone islands on skull x-rays and blue sclerae. He had also had fractures at the ages of 4 and 7 months. Follow-up showed that this boy, now aged 15 years, had several fractures with the development of similar hyperplastic calluses. These limitated joint motility, causing him to remain confined to his bed. Case 2. This girl of consanguineous parents had a fracture of the femora at the age of 1 month; she had blue sclerae and developed a hyperplastic callus. The roentgenographic studies showed generalized osteopenia and deformities indicating osteogenesis imperfecta.


CONCLUSIONS
Hyperplastic callus may develop in osteogenesis imperfecta. Its diagnosis may be difficult with neoplasms of bone, such as osteosarcoma, and its treatment is difficult.
Services de Pédiatrie, Hôpital T. Sfar Mahdia, Tunis, Tunisie.
H
H
Soua
L
L
Karboul
A
A
Ayadi
N
N
Sassi
H
H
Hamza
J P
JP
Padovani
M T
MT
Sfar
P
P
Maroteaux
D002146:Bony Callus / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D015576:Hyperostosis / Q000000981:diagnostic imaging / Q000209:etiology*; D007223:Infant; D008297:Male; D010013:Osteogenesis Imperfecta / Q000150:complications*; D011859:Radiography
Ostéogenèse imparfaite avec cal hypertrophique. A propos de deux observations à début précoce.