Brodie's abscess
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Brodie's abscess is a subacute osteomyelitis, which may persist for years before converting to a frank osteomyelitis. Classically, this may present after conversion as a draining abscess extending from the tibia out through the shin.
Most frequent causitive organism is Staphylococcus aureus.
Classic clinical presentation: Localized pain, often nocturnal, alleviated by aspirin. Often mimics the symptoms of Osteoid osteoma, which is typically < 1cm diameter.
Most frequent sites: Usually occurs at the metaphysis of long bones. Distal tibia, proximal tibia, distal femur, proximal or distal fibula, and distal radius.
Raidographic features: Oval elliptical or serpiginous radiolucency usually >1cm surrounded by a heavily reactive sclerosis, granulation tissue, and a Nidus often less than 1cm. The margins often appear scalloped on radiograph. Brodie's abscess is best visualized using Computed tomography (CT) scan.
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