From the RSNA Refresher Courses. Radiological Society of North America. Evaluation of the marrow space in the adult hip.
The adult pelvis and hip contain extensive marrow space in which a variety of processes may occur. Evaluation of this space requires an understanding of normal maturation and recognition that the marrow of the pelvis (axial skeleton) and that of the proximal femurs (appendicular skeleton) contain variable amounts of red and yellow marrow. At magnetic resonance (MR) imaging, this variability yields patterns in normal marrow ranging from very uniform and homogeneous signal intensity to patchy and heterogeneous signal intensity. The marrow space serves as a reflection of patient health and may herald developing anemia with reconversion of inactive to active marrow. Pathologic processes to be considered include marrow edema related to trauma, tumors, or infection; marrow ischemia and infarction; marrow infiltration from primary or secondary neoplasms or from infection; or complete loss of normal myeloid tissue in the marrow space. Each process can be effectively studied with MR imaging.
Andrews
C L
CL
Department of Radiological Sciences, University of California, Los Angeles, 200 UCLA Medical Plaza, Suite 165-59, Los Angeles, CA 90095, USA. candrews@mednet.ucla.edu
D000293:Adolescent; D000328:Adult; D000368:Aged; D000740:Anemia / Q000175:diagnosis; D001424:Bacterial Infections / Q000175:diagnosis; D001853:Bone Marrow / Q000033:anatomy & histology* / Q000098:blood supply / Q000293:injuries; D001855:Bone Marrow Diseases / Q000175:diagnosis*; D019046:Bone Marrow Neoplasms / Q000175:diagnosis / Q000556:secondary; D004487:Edema / Q000175:diagnosis; D005260:Female; D005269:Femur / Q000033:anatomy & histology; D025981:Hip Injuries; D006621:Hip Joint / Q000033:anatomy & histology*; D006801:Humans; D007238:Infarction / Q000175:diagnosis; D007511:Ischemia / Q000175:diagnosis; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010020:Osteonecrosis / Q000175:diagnosis; D010384:Pelvic Bones / Q000033:anatomy & histology / Q000293:injuries