Forearm foreign body

Case contributed by Dr Maulik S Patel

Presentation

History of penetrating injury to the forearm by a metal particle for 1 day.

Ultrasound

There is a tiny echogenic focus in the muscle plane near the site of skin entry.  Doppler shows twinkle artifact. There is no local collection. Adjacent radial artery is patent.

Case Discussion

Initial radiograph (not shown) demonstrated a single metal focus in the soft tissue of the forearm on the volar side.

Using gray scale ultrasound, the foreign body could not be localized initially. Switching on Doppler with high PRF, actually helped to localize the foreign body.  

Surgical exploration revealed a metal dense foreign body in the muscle plane.

As with stone, a metal foreign body with a irregular/rough surface produces twinkle artifact.

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Case information

rID: 46303
Case created: 30th Jun 2016
Last edited: 15th Jan 2017
Inclusion in quiz mode: Included

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