LAUSR

© BMJ Publishing Group Limited 2021. No commercial reuse. See rights and permissions. Published by BMJ. DESCRIPTION Inferior patellar dislocation is rare in clinical practices. A 57yearold man presented to the emergency department after slipping while cleaning the floor in the knee sitting position. He reported he suddenly slipped forward during the initiation of standing. Trauma evaluation revealed no intracranial, intrathoracic or intrabdominal injuries. He kept the left knee in flexion and had severe pain while extension. Lateral radiographs and CT scans of the left knee showed the patellar was locked by a loose body (figure 1). He underwent the peripheral nerve block of the lower left limb. The patellar was unlocked by being pushed to the distal end while slowly extending the knee. The postreduction radiographs revealed the left patellar restored to normal position (figure 2). The patient accepted a knee brace for temporary fixation and was recommended further surgical intervention. However, the patient decided not to take the surgery and then was asked for a regular followup. Currently, the patient has returned to daily life.