Index finger abscess
H/O penetrating injury by needle - Few days. C/o pain swelling - palmer aspect of index finger. Recent Plain radiograph of hand - No bony changes. Referred for ultrasound of index finger.
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About 22 x 15 x 8 mm sized hypoechoic area with central mobile echoes is noted in subcutaneous plane of index finger. It overlies distal part of proximal phalanx, proximal interphalangeal joint and base of middle phalanx.
It is superficial to flexure tendon.
No tenosynovitis of flexure tendon.
No foreign body is noted.
Local hypervascularity is noted except in central mobile echoes.
Dynemic scan shows free tendon movement.
No pully thickening / peri-pully ganglia is noted.
Palmer plates are intact.
No joint effusion or cortical erosion is noted.
Findings favour index finger abscess due to penetrating injury by needle.
I & D - Done. Pus drained.