Ultrastructure of the binary parotid glands in the Free-tailed bat,Tadarida thersites. II. Accessory parotid gland

Accessory parotid glands may be found in approximately 20% of patients and are heir to all diseases affecting the parotid gland proper. Between 1% and 7% of all parotid neoplasms arise from the accessory glands, and 50% of these are histologically malignant

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Ultrastructure of the Parotid Gland of the Nine-Banded Armadillo

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100080626 ◽

1977 ◽

Vol 35 ◽

pp. 640-641

Author(s):

J. R. Ruby

Keyword(s):

Endoplasmic Reticulum ◽

Parotid Gland ◽

Periodic Acid ◽

Acinar Cells ◽

Duct System ◽

Parotid Glands ◽

Dasypus Novemcinctus ◽

Anterior Portion ◽

Periodic Acid Schiff ◽

Thin Sections

Parotid glands were obtained from five adult (four male and one female) armadillos (Dasypus novemcinctus) which were perfusion-fixed. The glands were located in a position similar to that of most mammals. They extended interiorly to the anterior portion of the submandibular gland.In the light microscope, it was noted that the acini were relatively small and stained strongly positive with the periodic acid-Schiff (PAS) and alcian blue techniques, confirming the earlier results of Shackleford (1). Based on these qualities and other structural criteria, these cells have been classified as seromucous (2). The duct system was well developed. There were numerous intercalated ducts and intralobular striated ducts. The striated duct cells contained large amounts of PAS-positive substance.Thin sections revealed that the acinar cells were pyramidal in shape and contained a basally placed, slightly flattened nucleus (Fig. 1). The rough endoplasmic reticulum was also at the base of the cell.

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Management of Basal Cell Adenoma of Accessory Parotid Gland Through Transoral Approach: Report of a Rare Case With Review

Craniomaxillofacial Trauma & Reconstruction Open ◽

10.1177/24727512211030839 ◽

2021 ◽

Vol 6 ◽

pp. 247275122110308

Author(s):

Charudatta Naik ◽

Sanjay Joshi ◽

Bhupendra Mhatre ◽

Sneha Punamiya

Keyword(s):

Parotid Gland ◽

Basal Cell ◽

Benign Tumor ◽

Transoral Approach ◽

Surgical Approaches ◽

Basal Cell Adenoma ◽

Diagnostic Dilemma ◽

Cell Adenoma ◽

Rare Benign Tumor ◽

Accessory Parotid Gland

Diagnosis of mid-cheek mass has always been a diagnostic dilemma for clinicians. The incidence of the accessory parotid gland (APG) has been well documented in the literature. However, a diverse spectrum of pathologies can arise from this accessory parotid tissue. Basal cell adenoma is a rare benign tumor that predominantly affects the parotid gland. Its occurrence in the accessory parotid gland has been documented in 9 cases till date. Surgical approaches for the management of such APG lesions have been in debate. This report documents a case of Basal Cell Adenoma arising in accessory parotid tissue in a 55-year-old woman who was treated by transoral excision. This paper also reviews previously documented cases of all APG lesions and attempts to elucidate the rationale for selecting an appropriate surgical approach.

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18F-FDG-PET/CT in radiation therapy-induced parotid gland inflammation

European Journal of Hybrid Imaging ◽

10.1186/s41824-020-00091-x ◽

2020 ◽

Vol 4 (1) ◽

Author(s):

Alaa Mouminah ◽

Austin J. Borja ◽

Emily C. Hancin ◽

Yu Cheng Chang ◽

Thomas J. Werner ◽

...

Keyword(s):

Parotid Gland ◽

Fdg Pet ◽

Standardized Uptake Value ◽

Post Treatment ◽

Parotid Glands ◽

Positron Emission ◽

Pet Ct ◽

Average Maximum ◽

Pre Treatment ◽

Fdg Pet Ct

Abstract Background 18F-fluorodeoxyglucose-positron emission tomography/computed tomography (FDG-PET/CT) is used in the clinical management of oncologic and inflammatory pathologies. It may have utility in detecting radiotherapy (RT)-induced damage of oral tissues. Thus, the aim of the present study was to use FDG-PET/CT to evaluate parotid gland inflammation following RT in patients with head and neck cancer (HNC). Methods This retrospective study included patients with HNC treated with photon, proton, or combined photon/proton RT, in addition to chemotherapy. All patients received FDG-PET/CT imaging pre-treatment and 3 months post-treatment. The average mean standardized uptake value (Avg SUVmean) and the average maximum standardized uptake value (Avg SUVmax) of the left and right parotid glands were determined by global assessment of FDG activity using OsiriX MD software. A two-tailed paired t test was used to compare Avg SUVmean and Avg SUVmax pre- and post-RT. Results Forty-seven HNC patients were included in the study. Parotid gland Avg SUVmean was significantly higher at 3 months post-treatment than pre-treatment (p < 0.05) in patients treated with photon RT, but no significant differences were found between pre- and post-treatment Avg SUVmean in patients treated with proton RT or combined photon/proton RT. Conclusion Our results suggest that photon RT may cause radiation-induced inflammation of the parotid gland, and that proton RT, which distributes less off-target radiation, is a safer treatment alternative.

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A Case of Pleomorphic Adenoma Arising from Accessory Parotid Gland.

Practica Oto-Rhino-Laryngologica ◽

10.5631/jibirin.95.1241 ◽

2002 ◽

Vol 95 (12) ◽

pp. 1241-1245 ◽

Cited By ~ 2

Author(s):

Yoko HAGIIKE ◽

Hirofumi AKAGI ◽

Nobuhiko KIMURA ◽

Motoharu Eguchi ◽

Michiya KOSAKA ◽

...

Keyword(s):

Parotid Gland ◽

Pleomorphic Adenoma ◽

Accessory Parotid Gland

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Endoscopic transoral approach to accessory parotid gland

Auris Nasus Larynx ◽

10.1016/j.anl.2020.10.004 ◽

2020 ◽

Author(s):

Riccardo Lenzi ◽

Jacopo Matteucci ◽

Luca Muscatello

Keyword(s):

Parotid Gland ◽

Transoral Approach ◽

Accessory Parotid Gland

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Intraluminal crystalloids in malignant salivary gland tumours

The Journal of Laryngology & Otology ◽

10.1017/s0022215100103457 ◽

1987 ◽

Vol 101 (11) ◽

pp. 1175-1181 ◽

Cited By ~ 18

Author(s):

Jae Y. Ro ◽

Bruce Mackay ◽

John G. Batsakis ◽

Joiner Cartwright

Keyword(s):

Salivary Gland ◽

Parotid Gland ◽

Parotid Glands ◽

Salivary Duct ◽

X Ray ◽

Salivary Gland Tumours ◽

Pleomorphic Adenomas

AbstractThe ultrastructural, X-ray microanalytical, histochemical and immunocytochemi-cal features of intraluminal crystalloids found in adenocarcinomas of the parotid gland have been studied. The crystalloids, putatively derived from an abnormal crystalization of salivary duct proteins, are considerably different from the crystalloids found in normal parotid glands, pleomorphic adenomas, and sialocysts.

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FUNCTIONAL DISORDERSOF THE SALIVARY GLANDS IN PATIENTS WITH COMPRESSION AND DISLOCATION DYSFUNCTION OF THE TEMPOROMANDIBULAR JOINT AND THEIR CORRECTION

Wiadomości Lekarskie ◽

10.36740/wlek202107124 ◽

2021 ◽

Vol 74 (7) ◽

pp. 1695-1698

Author(s):

Oleg V. Rybalov ◽

Pavel I. Yatsenko ◽

Olga Yu. Andriyanova ◽

Elena S. Ivanytska ◽

Maria A. Korostashova

Keyword(s):

Parotid Gland ◽

Salivary Glands ◽

Functional State ◽

Oral Fluid ◽

Healthy Individuals ◽

Parotid Glands ◽

Posterior Teeth ◽

Fluid Content ◽

Lower Jaw ◽

Before And After

The aim: Is to assess the functional state of parotid glands and general secretion in patients with compression, dislocation dysfunction of TMJ, to correct the revealed disorders. Materials and methods: We examined 46 patients with dysfunction of TMJ. Examination included TMJ zonography and salivary glands sonography. We studied the general and parotid secretion, transparency, viscosity, pH of the oral fluid and the secretions of the parotid glands before and after treatment. The treatment of dysfunction and hyposialosis included the repositioning of the articular heads of the lower jaw in the correct anatomical position, the use of a repositioning plate on the posterior teeth at the compression side of the articular head, bougienage of the duct of the parotid gland, administration of 10% magnesium-mineral solution of bischofite into the gland. Results: In patients with TMJ dysfunction, a significant decrease in the oral fluid content was noted before treatment. The saliva transparency was reduced, the viscosity was increased, the pH was slightly acidic. A study, which was carried out a month after completion of the course of treatment showed that all the studied parameters corresponded to those in healthy individuals. Conclusions: The study confirmed that in compression and dislocation dysfunction of TMJ, there are disorders of the functional state of the salivary glands.

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Automatic Parotid Gland Segmentation in MVCT Using Deep Convolutional Neural Networks

ACM Transactions on Computing for Healthcare ◽

10.1145/3485278 ◽

2022 ◽

Vol 3 (2) ◽

pp. 1-15

Author(s):

Junqian Zhang ◽

Yingming Sun ◽

Hongen Liao ◽

Jian Zhu ◽

Yuan Zhang

Keyword(s):

Parotid Gland ◽

Head And Neck ◽

Helical Tomotherapy ◽

Radiation Treatment ◽

Automatic Segmentation ◽

Parotid Glands ◽

Deep Convolutional Neural Networks ◽

Megavoltage Computed Tomography ◽

Radiation Induced ◽

Segmentation Models

Radiation-induced xerostomia, as a major problem in radiation treatment of the head and neck cancer, is mainly due to the overdose irradiation injury to the parotid glands. Helical Tomotherapy-based megavoltage computed tomography (MVCT) imaging during the Tomotherapy treatment can be applied to monitor the successive variations in the parotid glands. While manual segmentation is time consuming, laborious, and subjective, automatic segmentation is quite challenging due to the complicated anatomical environment of head and neck as well as noises in MVCT images. In this article, we propose a localization-refinement scheme to segment the parotid gland in MVCT. After data pre-processing we use mask region convolutional neural network (Mask R-CNN) in the localization stage after data pre-processing, and design a modified U-Net in the following fine segmentation stage. To the best of our knowledge, this study is a pioneering work of deep learning on MVCT segmentation. Comprehensive experiments based on different data distribution of head and neck MVCTs and different segmentation models have demonstrated the superiority of our approach in terms of accuracy, effectiveness, flexibility, and practicability. Our method can be adopted as a powerful tool for radiation-induced injury studies, where accurate organ segmentation is crucial.

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