Nonabsorbable Suture of a PCL Allograft Resulting in a Squeaking Knee After PCL Reconstruction

This case report describes the occurrence of a squeaking knee joint on active flexion-extension in a 35-year-old man who had previously undergone posterior cruciate ligament (PCL) reconstruction surgery. The patient suffered from psychosocial distress because of the noise and complained of persistent left knee pain. After nonsurgical treatment failed to resolve the noise, arthroscopic surgery was performed to debride the interposed nonabsorbable suture located on the intra-articular surface, resulting in squeaking sound elimination.