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[PsA] Enthesitis of the flexor tendon DIJ

Patient Positioning

Patient seated in front of the examiner, hand palm up resting on a examination table.

Probe Positioning

Place the transducer on a longitudinal planes over the joints and tendons of interest. Do not use any pressure - especially while looking for effusion or using doppler mode. Use dynamic scanning to check the movement of the tendons during flexion / extension or against resistance to check the pulleys.

fdp tendon: flexor digitorum profundus tendon
dij: distal interphalangeal joint
e: effusion

Note: enthesitis of the flexor digitorum profundus tendon in a patient with psoriatic arthritis, effusion without doppler signal in the distal interphalangeal joint