Imaging of lower extremity infections: predisposing conditions, atypical infections, mimics, and differentiating
George R Matcuk1, Sanaz Katal2, Ali Gholamrezanezhad3,4
1Department of Imaging, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA. George.Matcuk@cshs.org.
Abstract:
Imaging evaluation for lower extremity infections can be complicated, especially in the setting of underlying conditions and with atypical infections. Predisposing conditions are discussed, including diabetes mellitus, peripheral arterial disease, neuropathic arthropathy, and intravenous drug abuse, as well as differentiating features of infectious versus non-infectious disease. Atypical infections such as viral, mycobacterial, fungal, and parasitic infections and their imaging features are also reviewed. Potential mimics of lower extremity infection including chronic nonbacterial osteomyelitis, foreign body granuloma, gout, inflammatory arthropathies, lymphedema, and Morel-Lavallée lesions, and their differentiating features are also explored.
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