Autoimmune disease characterized by subepidermal blisters and linear deposition of autoantibodies at the dermoepidermal junction. The accumulated autoantibodies are of immunoglobulin A and occasionally immunoglobulin G classes against epidermal basement membrane proteins. The dermatosis is sometimes associated with malignancies and use of certain drugs (e.g., vancomycin). The disease is Monarch Disease Ontology id MONDO_0018748 (linear IgA Dermatosis).