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We report an indigenous case of leprosy in New York City in an immunocompetent patient who was infected with a Mycobacterium leprae genotype that is consistent with an exogenous origin. Physicians in the eastern United States should be alerted that, although most patients who develop leprosy in the United States are foreign born, native-born Americans are also susceptible to the infection.

Infantile patients with acid maltase deficiency have severe hypertrophic cardiomyopathy, left ventricular outflow obstruction, and generalized muscle weakness and die before 1 year of age. We identified 12 infants with acid maltase deficiency who had a similar clinical presentation but less severe cardiomyopathy and absence of left ventricular outflow obstruction, and 9 of 12 had longer survival with assisted ventilation and supplemental intubation.