The term osteochondrosis is used to define a couple of disorders that affect the growing skeleton. These disorders result from abnormal growth, injury, or overuse of the developing growth plate and surrounding ossification centers. Although the exact etiology of these disorders is unknown, genetic causes, repetitive trauma, vascular abnormalities, mechanical factors, and hormonal imbalances may all contribute as a factor. The most common disorders in this group are osteochodrosis of the tarsal naviculae (Kohler disease), calcaneal apophysitis (Sever disease), apophysitis of the 5th metatarsal (Iselin disease), and infraction of the metatarsal head (Freiberg disease). A thorough understanding of the juvenile osteochondroses and apophysitis will help early diagnosis and better treatment in the growing juvenile sports population which in turn will provide early return to sports and patient satisfaction.