Abstract

Vitamin D deficiency is prevalent worldwide and has many consequences ranging from generalized aches, seizures, irritability, tetany, pathological fractures and osteomalacic myopathy. We discuss a rare case of an adolescent girl who presented with bilateral lower limb weakness and initially misdiagnosed as neuromuscular disorder but eventually found to have severe vitamin D deficiency leading to osteomalacic myopathy which masqueraded the features of bilateral femoral neck fractures. Severe osteomalacia as a cause of myopathy is underdiagnosed and may mimic a primary neuromuscular disorder. Any patient with generalized muscle pains should be first screened for common aetiologies such as VDD before proceeding to extensive investigations.