title: Role of the Accessory Parotid Gland in the Etiology of Parotitis: Statistical Analysis of Sialographic Features.
abstract: This retrospective study aimed to identify if the existence of the accessory parotid gland correlated with the etiology of parotitis. This may aid the development of better treatment strategies in the future. Sialographic features of cases with parotitis and healthy subjects were reviewed. The chi-square test was used to compare the incidence of accessory parotid gland between the groups. The Student's t test was used to compare the length of Stensen's duct, the length from the orifice to the confluence of the accessory duct, and the angle between the accessory duct and Stensen's duct between the groups. The incidence of accessory parotid gland in patients with parotitis was 71.8% (28/39), which was significantly higher than that in healthy subjects (P = 0.005). Patients with parotitis had a longer Stensen's duct than healthy subjects (P = 0.003). There was no significant difference in the length from the orifice to the confluence of the accessory duct or the angle between the accessory duct and Stensen's duct (P = 0.136 and 0.511, respectively) between the groups. The accessory parotid gland might play a role in the pathogenesis of parotitis. The existence of an accessory parotid gland is likely to interfere with salivary flow. Computational fluid dynamics analysis of salivary flow in the ductal system would be useful in future etiologic studies on parotitis.
authors.affiliation: Department of Oral Maxillofacial-Head and Neck Oncology, the Affiliated Hospital of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China.|Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, 510055, China.
authors.forename: Wangyong
authors.initials: W
authors.lastname: Zhu
authors.affiliation: Department of Oral Maxillofacial-Head and Neck Oncology, the Affiliated Hospital of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China.|Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, 510055, China.
authors.forename: Fengchun
authors.initials: F
authors.lastname: Hu
authors.affiliation: Department of Oral Maxillofacial-Head and Neck Oncology, the Affiliated Hospital of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China.|Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, 510055, China.
authors.forename: Xingguang
authors.initials: X
authors.lastname: Liu
authors.affiliation: School of Engneering, Sun Yat-sen University, Guangzhou, 510275, China.
authors.forename: Songcan
authors.initials: S
authors.lastname: Guo
authors.affiliation: Department of Oral Maxillofacial-Head and Neck Oncology, the Affiliated Hospital of Stomatology, Sun Yat-sen University, Guangzhou, 510055, China.|Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, 510055, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Tao
mesh_terms: D000328:Adult; D000886:Anthropometry; D002828:Choristoma / Q000000981:diagnostic imaging / Q000503:physiopathology*; D054893:Cone-Beam Computed Tomography; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D015994:Incidence; D008297:Male; D010306:Parotid Gland / Q000000981:diagnostic imaging / Q000503:physiopathology; D010309:Parotitis / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology; D012189:Retrospective Studies; D012212:Rheology; D018987:Salivary Ducts / Q000473:pathology / Q000503:physiopathology*; D012472:Salivation; D012796:Sialography; D055815:Young Adult