Diagnosis is typically based on physical signs, X-rays, and improvement after treatment. Differential diagnosis Various childhood onset disorders can mimic the clinical and X-ray picture of<unk>  such as: * Rickets * Osteochondrodysplasias especially osteogenesis imperfecta * Blount's disease * Osteomyelitis
Scurvy
Rickets
Hemosiderinuria
Pseudoporphyria
Harderoporphyria
Porphyria
Keratoglobus
Basophilia