MR demonstration of anomalous muscles about the volar aspect of the wrist and forearm.
Magnetic resonance (MR) examination of 42 normal wrists was performed for evaluation of anomalous musculature. A total of 23 muscle variations were found. An accessory abductor digiti minimi was found in 10 wrists (24%), an absent palmaris longus was found in seven wrists (16%), a muscular palmaris longus tendon was found in three wrists (7%), a muscular flexor digitorum superficialis was found in two wrists (5%), and an aberrant lumbrical muscle originating from within the carpal tunnel was found in one wrist (2.4%). Such muscle variations can be distinguished by MR from other mass lesions at the wrist and a knowledge of their frequency, appearance, and location can be of help in this regard.
Zeiss
J
J
Department of Radiology, Medical College of Ohio, Toledo 43699, USA.
Guilliam-Haidet
L
L
D000293:Adolescent; D000328:Adult; D005260:Female; D005542:Forearm / Q000002:abnormalities / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D018482:Muscle, Skeletal / Q000002:abnormalities* / Q000473:pathology; D014953:Wrist / Q000002:abnormalities / Q000473:pathology*