A, Lateral retinacular release can be done from inside out, which releases synovial layer and lateral retinaculum but can expose joint to subcutaneous tissue. Release is made from vastus lateralis muscle fibers proximally and distally to Gerdy’s tubercle if necessary. B, Outside-in technique also can be used, which allows synovial membrane to remain intact, leaving layer between subcutaneous tissue and intraarticular space. This also allows identification of lateral geniculate artery, which can be preserved.