Ribbing form, milder, with flat epiphyses and minimal involvement of the hands and feet. Fairbank form, more severe form, with late appearing epiphyses and greater involvement of the hands and feet. Patients have normal intelligence. Adult height usually range from 145 to170cm. Limb epiphyses show delayed appearing centers of ossification, often demonstrating a fragmented appearence.
Joint involvement is usually symmetric.
Premature arthrosis of weight-bearing joints, most frequently the hips, due to delay in ossification of the capital femoral epiphysis. The cartilaginous femoral head model becomes misshapen and incongruous with time, leading to early arthritis. Early detection may be possible through family history. Also may done by radiographic means. Schlesinger outlined distal femoral epiphyseal and metaphyseal measurements.