Abstract
Incidental bone lesions are commonly seen on abdominal and pelvic computed tomography (CT) examinations. These incidental bone lesions can be diagnostically challenging to the abdominal radiologist who may not be familiar with their appearance or their appropriate management. The characterization of such bone lesions as non-aggressive or aggressive based on their CT appearance involves similar principles to their morphologic evaluation on radiographs. Knowledge of the age of the patient and the presence of symptoms, mainly bone pain, can improve analysis. Examples of bone lesions that may be encountered include solitary or multifocal bone lesions, osteochondromatous and chondroid tumors, Paget's disease, avascular necrosis/bone infarctions, iatrogenic lesions, and periarticular lesions. This pictorial essay aims to provide a framework for the analysis of incidental bone lesions on CT and when further imaging and clinical work-up should be recommended.
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