This document discusses leg length discrepancy (LLD), also known as anisomelia, which is a condition where the paired lower extremities are noticeably different lengths. LLD is classified as either anatomical, involving a structural bone shortening, or functional, involving non-structural shortening from muscle weakness or contractures. Anatomical LLD can be congenital, developmental, or acquired through trauma or surgery. The document also describes methods for examining and measuring LLD, including the Wood block test and measuring apparent versus true leg lengths using a tape measure or radiography.