Brodie abscess in an 87-year-old man

Imaging results of the patient’s lower right leg taken 1 year before hospital admission. On the left, T2-weighted magnetic resonance imaging shows an encapsulated abscess surrounded by granulation tissue and bone edema (arrow) in the proximal part of the right tibia, causing subacute osteomyelitis. On the right, radiography shows a mass lesion (arrow), misdiagnosed as a bone tumor.