A 20-year-old male presented to the OPD with a deep boring pain in the upper end of left tibia which worsened at night/while walking and is relieved by rest. On examination, there is effusion in the knee joint along with tenderness and thickening of the bone. X-ray of the concerned area was taken. MRI of the concerned area was also done.
Brodie abscess is an intraosseous abscess related to a focus of subacute pyogenic osteomyelitis. It has a predilection for ends (metaphysis) of tubular bones: Proximal/distal tibial metaphysis (most common) Carpal and tarsal bones Rarely traversing the open growth plate; epiphysis (in children and infants). X-ray features: - Lytic lesion often in an oval configuration that is oriented along the long axis of the bone Surrounded by a thick dense rim of reactive sclerosis that fades imperceptibly into surrounding bone Periosteal new-bone formation +/- adjacent soft-tissue swelling MRI features: - The penumbra sign is a characteristic magnetic resonance (MR) feature of subacute osteomyelitis. It is seen as a discrete peripheral zone of marginally higher signal intensity than the central bony abscess cavity and the surrounding lower signal intensity of the reactive new bone and edema.
Brodie's abscess
Garre's osteomyelitis
Septic ahritis
Chronic osteomyelitis
Integrated QBank