title: Two cases of petrosquamosal sinus in the temporal bone presented as perioperative finding.
abstract: The petrosquamosal (PSS) is an embryonic emissary vein of the temporal bone in humans and connects the intra- and extracranial venous networks. Few reports in the recent literature provide detailed descriptions of PSSs that are found before or during surgeries. We report the presence of PSS in two patients with chronic otitis media. An abnormal vessel was found originating from the sigmoid sinus of each patient. The vessels coursed anteroinferiorly over the superior portion of the temporal bone and terminated near the posterior part of the temporomandibular joint. The clinical significance of PSS and a brief literature review are presented.
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, Seoul Metropolitan Government, Seoul National University Boramae Medical Center, Seoul, Korea.
authors.forename: Yong-Hwi
authors.initials: YH
authors.lastname: An
authors.forename: Jee Hye
authors.initials: JH
authors.lastname: Wee
authors.forename: Kyu-Hee
authors.initials: KH
authors.lastname: Han
authors.forename: Young Ho
authors.initials: YH
authors.lastname: Kim
mesh_terms: D000328:Adult; D002550:Cerebral Veins / Q000002:abnormalities*; D002908:Chronic Disease; D003392:Cranial Sinuses / Q000002:abnormalities*; D005260:Female; D006801:Humans; D008875:Middle Aged; D010033:Otitis Media / Q000150:complications; D013701:Temporal Bone / Q000098:blood supply*