[Hereditary neuropathy with dominant inheritance, giant axons and cardiac involvement].

Showing the clinical, genetic and electrophysiological features, the diagnosis of hereditary motor and sensory neuropathy type II (HMSN) in a german kinship was questioned by unusual findings in 3 members of the family: they presented signs suggestive of cardiomyopathy and the sural nerve biopsy showed occasional giant axons with neurofilament accumulation. These findings may mean either a new type within the heterogeneous group of peroneal muscular atrophies or that these features have not been realized in HMSN II as yet.