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Proximal interphalangeal joint:
- effusion in dorsal as well as palmer recess
- synovial thickening and hypervascularity present
- erosion on dorsal aspect of proximal phalanx (also seen on plain radiograph - not uploaded)
- linear echogenic focus (1.2 mm long) is seen deep to extensor tendon consistent a foreign body; it is deep to ulnar side of lateral slip of extensor tendon
Flexor tendon is intact with no evidence of tenosynovitis. Extensor tendon is intact.
Soft tissue oedema on dorsal as well as palmer aspect of proximal interphalangeal joint with hypervascularity.