TAFAZZIN and familial dilated cardiomyopathy: One was a ring form with a large deletion of the long arm (including the Xq28 region) and the second had a large deletion of exons 1–5 of TAZ. Problems in this patient included intrauterine growth retardation and the development of severe dilated cardiomyopathy (DCM) with left ventricular non-compaction (LVNC) at one month of age.