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Fig. 1A —42-year-old man 2 months after hand trauma (resulting from fall) with final diagnosis of posttraumatic neurogenic edema of dorsal interosseus muscles. Transaxial T1-weighted spin-echo MR image (TR/TE, 500/14) shows normal findings; in particular no atrophy of intrinsic hand muscles is noted. 1 = abductor pollicis brevis muscle; 2 = flexor pollicis brevis muscle; 3 = opponens pollicis muscle; 4 = adductor pollicis muscle; 5 = dorsal interosseus muscles; 6 = palmar interosseus muscles; 7 = opponens digiti minimi muscle; 8 = flexor digiti minimi muscle; 9 = abductor digiti minimi muscle.