Searching for Clues in the Diagnosis of McArdle Disease.

Introduction McArdle disease (glycogen storage disorder type 5) is an autosomal recessive metabolic myopathy caused by a myophosphorylase enzyme deficiency. Most patients develop symptoms during childhood; however, diagnosis is usually delayed until adulthood. Our study aimed to identify clues for an earlier recognition of this rare disease.

Epidemiologic Study of Myasthenia Gravis in the Elderly US Population: A Longitudinal Analysis of the Medicare Claims Database, 2006-2019.

Background And Objectives: Epidemiologic studies suggest increasing incidence and prevalence of myasthenia gravis (MG) among the elderly population outside the United States. We aimed to provide an estimation of MG incidence and prevalence and their trend among the Medicare Fee-For-Service (FFS)-covered elderly US population.

Methods: We performed a retrospective longitudinal study using Medicare claims data (2006-2019).