LAMP2 and cardiomyopathy: Danon's disease has an autosomal dominant X-linked character due to LAMP2 enzyme deficiency and the triad of heart failure with hypertrophic cardiomyopathy, skeletal myopathy and mental deficit in male patients and only cardiomyopathy in women.71 The phenotype of cardiomyopathy is usually hypertrophic but dilated has also been described.