Besides the typical forms of dermatitis herpetiformis (DH) and bullous pemphigoid (BP) of adults and children, there are cases combining clinical, histological and electronmicroscopic features of both. Linear continuous IgA deposits along basement membrane zone (BMZ) are a most characteristic finding. They differ from the granular IgA deposits in DH, even if these are also distributed along the BMZ (however, preserving as a rule their granular pattern). IgG circulating anti-BMZ antibodies are absent, whereas in some cases IgA anti-BMZ antibodies may be found. In contrast to DH, there is no gluten-sensitive enteropathy, and the gluten-free diet is ineffective. The recognition of this bullous disease as a distinct entity is of practical significance because these cases respond well to combined treatment with sulfones and corticosteroids, all in small doses. Because of diagnostic importance of linear IgA deposits at BMZ we have proposed the name IgA linear dermatosis. In children a counterpart of IgA linear dermatosis of adults is chronic bullous disease of childhood (CBDC), which we propose to call IgA linear dermatosis of childhood.