MH, which is a clinically heterogeneous autosomal dominant, pharmacogenetic disorder, with a reduced penetrance and variable expression, has been reported from many countries
[ispub.com]
The Orphanet rare disease nomenclature is comprised of a heterogeneous typology of entities of decreasing extension, including: groups of disorders, disorders, sub-types.
[orpha.net]
The genetic mutations associated with this disorder lead to the heterogeneity of inheritance and clinical presentation.
[calpoison.org]