Histiocytoid cardiomyopathy in infancy: a new hypothesis?

A case of histiocytoid cardiomyopathy in a ten-month-old boy is reported. Histologic and ultrastructural examinations led us to consider the possibility that the disease, rather than being a focal lesion of the common myocardium as it was heretofore considered, might be regarded as a diffuse lesion on the specific myocardium.