Limb-girdle muscular dystrophy (LGMD) is a descriptive term applied to a clinically and genetically heterogeneous group of childhood- and adult-onset muscular dystrophies. LGMD is characterized by weakness and wasting restricted to the limb musculature; usually proximal muscles early on, then distal muscles later. There are more than 50 genes associated with LGMD that have various modes of inheritance. This, combined with a vast variability in age of onset, progression, and distribution of weakness, makes the diagnosis of a specific subtype of LGMD a challenge. And for some individuals, the science of genetics hasn’t caught up to their clinical diagnosis.