Intra and extramedullary fat globules as an MRI marker for osteomyelitis

Magnetic resonance imaging (MRI) findings of acute osteomyelitis vary from non-specific bone marrow edema to more reliable signs such as bone destruction, periosteal reaction, and sequestrum. In some cases, imaging features could overlap with other conditions such as trauma and bone tumors. Intra and extramedullary fat globules are a helpful MRI marker for osteomyelitis, as shown in the following case report. We report the MRI findings of a 15-year-old young man with distal femur osteomyelitis, associated with intra and extramedullary fat globules.We present the MRI features of the case and emphasize the importance of noting additional signs of osteomyelitis to make a precise diagnosis.