Mustafa Mohamed Alikhan MD, Presenter: Nothing to Disclose

Liem Thanh Mansfield MD, Abstract Co-Author: Nothing to Disclose

On MR, abnormal signal in bone marrow has wide differential diagnosis Recognition of pattern to signal abnormality helps to narrow differential diagnosis The common patterns of bone marrow abnormality are subtendinous, subligamentous, subchondral, subphyseal, endosteal, periosteal, kissing bone contusions, double line sign, penumbra sign, fat containing, fluid-fluid level, and multiplicity

Marrow conversion / reconversion Patterns of bone marrow abnormalities and associated differential diagnosis Subtendinous: tendon tear, tenosynovitis, HADD, enthesitis Subligamentous: ligament tear, renal osteodystrophy Subchondral: chondromalacia, OCD, kissing bone contusions, insufficiency fracture, AVN, transient osteoporosis, infection, inflammatory arthritides, neoplasms Subphyseal: SCFE, Brodie's abscess, renal osteodystrophy, rickets, metastases Endosteal: stress fracture, osteoid osteoma, osteomyelitis Periosteal: stress fracture, osteoid osteoma, osteomyelitis Kissing bone contusions: clip injury, dashboard injury, hyperextension injury, patellar dislocation, pivot shift injury Double line sign: bone infarct Penumbra sign: Brodie's abscess Fat containing: intraosseous hemangioma, intraosseous lipoma Fluid-fluid level: benign or malignant Multiplicity: "FEEMMHI" mnemonic

http://abstract.rsna.org/uploads/2014/14003591/14003591_mcdg.pdf

Alikhan, M, Mansfield, L, Abnormal Signal Intensity in the Bone Marrow at MR Imaging: Pattern Recognition, Pearls, and Pitfalls.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14003591.html