Osteomyelitis
（重定向自Hematogenous Osteomyelitis）
![](/Images/godic/202501/17/Ostermyelitis_Tibia0956.jpg")
![Mycobacterium doricum osteomyelitis and soft tissue infection. Computed tomography scan of the right lower extremity of a 21-year-old patient, showing abscess formation adjacent to nonunion of a right femur fracture.](/Images/godic/202501/17/Mycobacterium_doricum_Osteomyelitis_and_Soft_Tissue_Infection0956.jpg")
Osteomyelitis (or OM) is infection and inflammation of the bone and bone marrow. It can be usefully subclassified on the basis of the causative organism (pyogenic bacteria or mycobacteria) and the route, duration and anatomic location of the infection. Osteomyelitis usually begins as an acute infection, but it may evolve into a chronic condition.