Thus, the differential diagnosis of early bullous pemphigoid is broad and includes conditions such as prurigo, urticaria, allergic contact dermatitis, arthropod reactions, pemphigus foliaceus, scabies, and vasculitis.
auricle. 1. the projecting part of the ear lying outside the head; called also pinna. Auricle. 2. the ear-shaped appendage of either atrium of the heart; formerly used to designate the entire atrium.(aw'ri-kl), [TA] Avoid the outmoded use of this word in the sense of atrium.uricle. 1. the projecting part of the ear lying outside the head; called also pinna. Auricle. 2. the ear-shaped appendage of either atrium of the heart; formerly used to designate the entire atrium.
The left auricle is a thin pouch of the heart wall located on the anterior surface of the left atrium. Its walls are only about one sixteenth of an inch (1 mm) in thickness and less than 1 inch (2.5 cm) in length. The outermost layer of the auricle is the epicardium, a layer of simple squamous epithelial tissue that gives the auricle a smooth, slick surface. 2  Pericardial fluid is produced by the epicardium to lubricate its surface and prevent irritation during the movement of the heart.