This document discusses the surgical anatomy and treatment of varus knee deformities. It describes Maquet's line and how it is medialized in varus knees. It then classifies varus deformities into 5 categories and details the surgical steps to correct it, including: creating a medial sleeve; removing osteophytes; checking and releasing ligaments like PCL, semimembranosus, and superficial MCL if gaps remain tight; and lateralizing the tibial component by shifting and reducing it. The goal is to create symmetrical extension and flexion gaps and restore the mechanical axis.