The Lachman test is an orthopedic test used for examining the anterior cruciate ligament.Instructions:The patient's knee is in about 20-30 degrees flexion and then moved passively towards himself by the examiner. Anterior translation of the tibia associated with a soft or a mushy endpoint indicates a positive test. If the test is positive the anterior cruciate ligament is with a high probability injured.A variation of this test is the so-called stable Lachman test, in which the knee of examiner is place underneath the knee of the patient to act as an abutment when pulling. Significance:The Lachman test is a quick and inexpensive way to make an exploratory investigation of the stability of the knee. The significance for injuries of the anterior cruciate ligament is increased in comparison to the "drawer test" especially with fresh injurie.