Possible genetic heterogeneity of X-linked ichthyosis.

A presumably "new" type of X-linked ichthyosis was observed in a kindred over three generations. Clinical and histologic findings are intermediate between the autosomal dominant ichthyosis vulgaris and the classical X-linked form (type Wells-Kerr) of the disease. This may indicate genetic heterogeneity of X-linked ichthyosis or a wider clinical spectrum than previously assumed.