Epidermolysis Bullosa, Junctional 3b, Severe, is also known as epidermolysis bullosa, junctional 3b, generalized severe. An important gene associated with Epidermolysis Bullosa, Junctional 3b, Severe is LAMC2 (Laminin Subunit Gamma 2). Affiliated tissues include skin, and related phenotypes are abnormality of the nail and abnormal blistering of the skin