Monarch Disease Ontology term MONDO_0012807 (epidermolysis bullosa simplex 5C, with pyloric atresia) is a basal subtype of epidermolysis bullosa simplex (EBS) characterized by generalized severe blistering with widespread congenital absence of skin and pyloric atresia. Also known as: EBS-PA, epidermolysis bullosa simplex with pyloric atresia.