What is osteomyelitis?

Osteomyelitis is defined as an inflammation of the bone and bone marrow, typically caused by an infection. It often arises when bacteria or other pathogens enter the bone tissue, leading to a localized infection that can severely affect the health of the bone. This condition can manifest with symptoms such as pain, fever, and swelling in the area surrounding the bone.

In the context of the other options, it's important to note that a fracture of the bone pertains to a break in the bone structure and does not involve infection or inflammation. An inflammation of the ligament describes a different condition entirely, one that relates to soft tissue rather than direct bone involvement. Degeneration of cartilage refers to a breakdown or wearing away of cartilage typically associated with conditions like osteoarthritis, which is separate from the infectious process described by osteomyelitis. Understanding these distinctions helps clarify why the inflammation of bone and marrow is the correct diagnosis for this condition.