Variants Haematologists have identified a number of variants. These can be classified as below. * Overhydrated<unk>  * Dehydrated HSt (hereditary xerocytosis; hereditary hyperphosphatidylcholine haemolytic anaemia) * Dehydrated with perinatal ascites * Cryohydrocytosis * 'Blackburn' variant. * Familial pseudohyperkalaemia There are other families that do not fall neatly into any of these classifications.<unk>  is also found as a hereditary disease in Alaskan malamute and miniature schnauzer dogs.
Hereditary stomatocytosis
Hereditary sclerosing poikiloderma
Hypohidrotic ectodermal dysplasia
Hereditary angioedema
Nickel allergy
Rapunzel syndrome
Hereditary mucoepithelial dysplasia
Griscelli syndrome