What condition is characterized by inflammation of both bone and cartilage?

The condition characterized by inflammation of both bone and cartilage is indeed osteochondritis. This term specifically refers to the inflammation that affects the bone and the contiguous cartilage, often resulting from repetitive trauma or insufficient blood supply to the affected area. Osteochondritis can lead to pain and persistent issues if not addressed, as both the bone and cartilage play crucial roles in joint function and stability.

In contrast, the other terms listed refer to different conditions: osteosarcoma is a type of bone cancer, osteoporosis is a condition marked by decreased bone density and increased fracture risk, and osteopenia indicates lower than normal bone density but not to the degree of osteoporosis. Understanding these distinctions is important in accurately diagnosing and treating musculoskeletal conditions.