Osteochondrosis affects which part of the skeletal system?

• A. Articular cartilage
• B. Ossification centers
• C. Periosteum
• D. Diaphysis

Answer: (B)

Osteochondrosis is a disorder that primarily involves the ossification centers, which are specific regions in growing bones where cartilage transforms into bone. These centers are crucial during growth because they dictate the lengthening and shaping of bones. In osteochondrosis, there is a disruption of blood supply to these ossification centers, leading to avascular necrosis and resultant bone deformities.

This condition is particularly relevant in pediatric populations, as it can affect the normal development of bones and joints, such as the femoral head (in Legg-Calvé-Perthes disease) or the knee (as seen in Osgood-Schlatter disease). Understanding the role of ossification centers is essential for recognizing the implications of osteochondrosis on growth and development in the skeletal system.