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The stump impingement reflex: a sign of anterior cruciate ligament rupture in the locked knee?
  1. M R Carmont,
  2. D Rees
  1. Sports Injury Surgery, The Robert Jones & Agnes Hunt Hospital, Oswestry, Shropshire, UK
  1. M R Carmont, Sports Injury Surgery, The Robert Jones & Agnes Hunt Hospital Oswestry, Shropshire, SY10 7AG, UK; mcarmont{at}

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We would like to highlight a clinical sign observed during the acquired experience of 15 years of anterior cruciate ligament (ACL) reconstruction surgery. Although it is well appreciated that the Lachmann test is the most sensitive clinical sign for detecting ACL rupture, this sensitivity may be reduced in the presence of a locked knee.1 The anterior drawer may be restricted by a physical block …

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  • Competing interests: None.