An ultramicroscopic study of the skin in the diagnosis of the infantile and late infantile types of ceroid-lipofuscinosis.

A skin biopsy was carried out in two children suffering from early infantile (Santavuori) and late infantile (Jansky-Bielschowsky) types of ceroid-lipofuscinosis. In both cases cytoplasmic inclusions, identical with those found in neurones, were present in the skin. Skin biopsy thus appears as a simple technique for the diagnosis of the ceroid-lipofuscinoses.