Epidermolysis Bullosa, Junctional 1b, Severe, also known as epidermolysis bullosa, junctional, herlitz type, is related to epidermolysis bullosa, junctional 5b, with pyloric atresia and pyloric atresia, and has symptoms including onychomadesis and exuberant granulation tissue. An important gene associated with Epidermolysis Bullosa, Junctional 1b, Severe is LAMB3 (Laminin Subunit Beta 3), and among its related pathways/superpathways are Integrin Pathway and Phospholipase-C Pathway. Affiliated tissues include skin and eye, and related phenotypes are failure to thrive and abnormality of the nail