Bone marrow edema (BME) has been a topic of increasing interest in the literature in recent years. BME is associated with numerous pathologies and is becoming recognized not only as a considerable pain generator, but also as an entity which is, in some cases, significantly linked to the worsening of patient prognosis. To date, no thorough imaging review of BME has been published. An electronic literature search was conducted through PubMed with a time parameter of January 1975 through December 2007. The primary search parameter was "bone marrow edema." Over 800 papers were listed as written in English and involving humans. Other refining parameters included "AND syndrome," "AND transient," "AND arthritis," "AND infection," "AND tumor," "AND neoplasm," "AND iatrogenic," "AND radiation therapy," and "AND inflammation." More current articles were favored over dated articles on the same topic. A total of 106 journal articles were collected concerning BME and multiple pathologic processes. The data contained therein was compiled and organized into a comprehensive format. BME can be caused by, and found concurrent with, a broad spectrum of pathologies which exhibit a variety of imaging findings. BME is also associated with the deterioration of certain pathologies. This presentation is a comprehensive discussion of different pathological conditions inducing or associated with BME. Differential diagnosis through appropriate imaging is vital to case management and could contribute to the prevention or decreased progression of certain pathologies. Continued investigation into the imaging of BME and its associated diseases, as well as the effect of BME on prognosis, is warranted.

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