Epidermolysis Bullosa, Junctional 5a, Intermediate, also known as epidermolysis bullosa, junctional 5a, generalized intermediate, is related to epidermolysis bullosa simplex 1c, localized and epidermolysis bullosa simplex. An important gene associated with Epidermolysis Bullosa, Junctional 5a, Intermediate is ITGB4 (Integrin Subunit Beta 4). Affiliated tissues include skin, and related phenotypes are urethral stenosis and abnormal blistering of the skin