Figure 2: Three generation pedigree of a Mexican Mestizo family affected by PsV. Subjects I 1, II 1, II 11 and III 13 were diagnosed and treated for PsV. Subject II-5 has presented some sporadic plaques however has not been diagnosed. Lesions’ age-onset referred in their medical records of individuals: I 1, II 1, II 5, II 11, III 13 were 44, 41, 33, 4 years old and 4 months, respectively.