Among them are paroxysmal atrial tachycardia, paroxysmal junctional tachycardia, auricular tachycardia and nodal tachycardia. Blue nevus, junctional nevus and compound nevus. Morphological characteristics of junctional epidermolysis bullosa are rudimentary hemidesmosomes and subepidermal tissue separation. Surface cells have no basement membrane or junctional complexes denoting an epithelium despite superficial resemblance. This junction has three epithelial types&colon; gingival, sulcular, and junctional epithelium. The slow heart rate may also lead to atrial, junctional, or ventricular ectopic rhythms. Initiation of AVRT may be through a premature impulse of atrial, junctional, or ventricular origin. These short actin filaments act as junctional complexes allowing the formation of the hexagonal mesh. Its malignant sequela, esophagogastric junctional adenocarcinoma, has a mortality rate of over 85%. Features of adenomyosis are disruption, thickening, enlargement or invasion of the junctional zone. Three objective measures of the junctional zone can be used to diagnose adenomyosis. This is also known as a junctional scotoma. It is specifically found in the spongiotrophoblast cells of the junctional zone. These "junctional" rhythms are characterized by a missing or inverted P wave. The need exists for controlling junctional bleeding, especially in the pelvic area.