40+ Drainage Preauricular Sinus Anatomy Pics. Preauricular sinuses are common congenital malformations first described by heusinger in 1864. Preauricular sinus is a common birth defect that may be seen during a routine exam of a newborn.

Anatomy And Physiology Of Nose And Paranasal Sinuses from image.slidesharecdn.com

A retrospective analysis of 110 patients who underwent pas excision was done. Expansile pulsation of internal internally lined by endothelium, which is continuous with the veins. Development of preauricular sinus due to incomplete or defective fusion of these hillocks.

Preauricular pits and sinuses are congenital anomalies located in or just in front of the ascending limb of the helix (figure 1).

Preauricular sinuses are frequently noted on routine physical examination as small dells adjacent to the external ear, usually at the anterior margin of the ascending limb of the helix. A hole in the ear is known as a preauricular pit. Lymphatic drainage laminated anatomy chart. Superior and inferior opthalmic veins drain the eye.