A stepwise approach decoding edema-like marrow signal intensity around knee joint: A pictorial review

Edema-like marrow signal intensity (ELMSI) is defined as an area of altered signal intensity within the bone marrow presenting as hyperintensity on fluid-sensitive sequences and is a non-specific finding on magnetic resonance imaging. The presence of ELMSI at specific locations in certain cases around the knee joint can help in correctly identifying the underlying condition. Herein, we aim to categorize and review the ELMSI according to underlying bony anatomical locations, in the three orthogonal imaging planes separately, for easy understanding and interpretation of some common and uncommon underlying conditions.