Get Inside Preauricular Sinus Anatomy PNG. Preauricular sinus is a common birth defect that may be seen during a routine exam of a newborn. A preauricular sinus is a common congenital malformation characterized by a nodule, dent or dimple located anywhere adjacent to the external ear.

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Preauricular sinus is a common birth defect that may be seen during a routine exam of a newborn. This article covers the anatomy of the cavernous sinus, including structure, contents, relations and communications. Preauricular sinuses are frequently noted on routine physical examination as small pits or small openings adjacent to the external ear.

Cavernous sinuses are paired dural venous sinuses located in the middle cranial fossa on the side of the body of sphenoid bone.

Cavernous sinuses are paired dural venous sinuses located in the middle cranial fossa on the side of the body of sphenoid bone. 52 preauricular sinus is a common birth defect that may be seen during a routine exam of a newborn. Once it exits the cavernous sinus it courses intracranially over the anterior clinoid process and terminates in a t junction giving rise to the anterior cerebral artery medially and the middle cerebral artery laterally. A preauricular sinus (also known as a congenital auricular fistula, a congenital preauricular fistula, an ear pit,:782 or a preauricular cyst) is a common congenital malformation characterized by a nodule, dent or dimple located anywhere adjacent to the external ear.