Danon Disease is a rare genetic condition causing muscle weakness
(muscular dystrophy), heart disease (cardiomyopathy), and mental retardation (or learning problems).
was first described in 1981, and affects males more severely than females. Boys will often develop symptoms in childhood
or adolescence, while in females the smptoms may not be apparent until adolescence or adulthood. Although males have and
earlier and more rapidly progressive disease, serious medical problems can occur in females.
The disease is NOT well-understood
and physicians are largely unfamiliar with Danon Disease. In fact, most physicians probably had not even heard of Danon Disease.
We (the medical commmunity) do not yet know how many people and families are affected with Danon Disease.