Synovial chondromatosis is an uncommon benign condition emerging from the synovial membrane of the joints, synovial sheaths or bursae around the joints 1. Synovial chondromatosis commonly influences the big joints in the third to fifth decade of life. The motivation behind this case report is to record this uncommon synovial pathology in 25 years young male which required open synovectomy and debridement to treat it. Synovial chondromatosis is an uncommon benign condition. Patients generally present with swelling, pain and including the synovial covering of joints, synovial sheaths and movement restriction 2. It is the metaplastic procedure of synovium. It affects mainly large joints; knee, hip, which is an uncommon age group for this synovial pathology and shoulder, lower leg and wrist. Inclusion of smaller joints additionally, which incorporates distal radioulnar, peripheral synovium, which supposedly has tibio-fibular, metacarpophalangeal and metatarsophalangeal not been archived in before reports 2. Bursae around the joints are additionally significant uncommon areas for synovial chondromatosis 3. It typically shows in third to fifth decade of life. It is a rare case in 25 years young male presented with swelling and pain over right knee since 3 years. Histopathology Received pearly white cartilage bits with fibrofatty tissue. Gross Numerous round osteocartilaginous nodules. Histopathology Report Multiple sections studied from right knee synovial biopsy shows synovial tissue and multiple nodules of chondroid tissue and few muscle bundles. Impression Synovial chondromatosis (metaplasia) right knee biopsy.