relapsing linear acantholytic dermatosis relapsing linear acantholytic dermatosis relapsing linear acantholytic dermatosis is a cutaneous condition characterized by relapsing linear erosions and crusting, histologically identical to hailey–hailey disease.: 849 it is not to be confused with transient acantholytic dermatosis. relapsing linear acantholytic dermatosisspecialtydermatology