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Thenar transverse scan of MCP joint

The patient sits, hand supinated, arm supported. The transducer is placed transversely over the base of the thenar eminence at 90o to the long axis of the first metacarpal bone. Skin, subcutaneous fat, flexor pollicis brevis muscle, flexor pollicis longus tendon and adductor pollicis are clearly visualised.

Ultrasound in rheumatology

Read our Topical Reviews report on the applications and value of ultrasound in the assessment and treatment of musculoskeletal conditions

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