Stener-Like Lesion of the Radial Collateral Ligament of the Proximal Interphalangeal Joint of the Fifth Finger: A Case Report

We present a case of volar subluxation of the fifth finger proximal interphalangeal (PIP) joint following a volleyball trauma. The injury was initially misdiagnosed as a central slip lesion. The persistent pain and PIP joint stuck in flexion led us to perform a second ultrasound exam that showed a complete rupture of the radial collateral ligament and interposition of the radial band of the extensor between the edges of the torn ligament and in the PIP joint. The patient underwent surgery. The radial lateral band was released from the joint space, and the radial collateral ligament was repaired. Among the many cases of PIP joint sprains encountered in busy emergency departments and by hand surgeons in consultation, this insidious presentation, which can easily be missed, should be searched for. If missed, these lesions can lead to very poor outcomes for the patient.