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Fig. 1D. —41-year-old man with abnormalities on symptomatic and contralateral asymptomatic sides of knee. Coronal T1-weighted (450/14) spin-echo (C and D) and coronal STIR (5550/35; inversion time, 160 msec (E and F) MRIs show edema-like (arrowheads, E) and necrosis-like (straight arrow, C) bone abnormalities on symptomatic side (C and E) but not on asymptomatic side (D and F). Slight collateral ligament thickening (curved arrow, C) and pericapsular edema (arrows, E) are seen only on symptomatic side (C and E).