Different mutations identified in six unrelated HSP-affected families: DUK2369, DUK2354, DUK1959, DUK2036, DUK2189, and DUK2299. All families showed an uncomplicated HSP phenotype. The pedigrees present affected (blackened symbols) and unaffected (unblackened symbols) subjects. The clinical phenotypes were fully penetrant. All tested individuals are indicated (+/), as are mutations (/+) and wild-type genotypes (/−).