Introduction:

Palmer's disease (or Palmer's syndrome) is poorly understood and is due to traumatic rupture of the internal collateral ligament of the knee at the femoral insertion.

Objective:

to present three patients suffering from Palmer's disease as a consequence of a traumatic internal collateral ligament injury of the knee at another time.

Methods:

study of multiple cases of patients treated by arthroscopy in the period from January 2002 to January 2020. Aspects such as age, sex, cause, time to operation and procedure performed were analyzed. The results were evaluated using the visual analog scale for pain and the Lysholm assessment scale.

Results:

all are young active males, two with right knee injury, two with history of sports trauma and one work-related. Pain, block, knee extension limitation and Böhler, Mc Murray and Apley maneuvers were positive in all patients. There was a significant improvement in the visual analog scale for pain and in the Lysholm scale postoperatively.

Conclusions:

Palmer's disease is secondary to internal collateral ligament injury that simulates an internal meniscus injury; its diagnosis and resolution are possible with arthroscopy and intensive rehabilitation.

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