These findings suggest that the superior pharyngeal constrictor muscle may also play an important role in the expression of smooth coordinated movements associated with ingestion, from mastication to swallowing. The present study found that the superior pharyngeal constrictor muscle is attached to the buccinator muscle (which plays an important role in mastication) with mucosa and originates from the mandible and root of the tongue. Morphology of the origin of the muscle at the mylopharyngeal part could be divided into two types: type A, tip of the origin on the mylohyoid line and type B, tip of the origin away from the mylohyoid line. In all three types, the muscle at the buccopharyngeal part transitionally originated from the buccinator muscle. Morphology of the origin of the muscle at the buccopharyngeal part could be divided into three types: type A, membranous morphology from superior to inferior areas type B, membranous only in superior area and type C, complete lack of membrane. Oropharynx Superior and middle pharyngeal constrictor muscles Nasopharynx Hard palate Superior pharyngeal constrictors Circumvallate papillae Anterior. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.To clarify the morphologic characteristics of the superior pharyngeal constrictor muscle, which plays an important role in swallowing, the gross anatomy of the pterygopharyngeal, buccopharyngeal, mylopharyngeal, and glossopharyngeal parts of the muscle was examined. The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. This is particularly important when the recommended agent is a new and/or infrequently employed drug.ĭisclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher.ĭrug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. Margin status may be ideally determined by the integrity of the SPC muscle in future oncologic studies, rather than an adequate distance measurement.Ĭopyright: All rights reserved. Conclusion: Due to the limited width of the SPC muscle, a margin in excess of 2 mm may not be attainable in a transoral radical tonsillectomy. The large structures on the lateral aspect of the pharynx are. The mean distance from tonsil carcinoma to the lateral specimen margin was 1.79 ± 1.39 mm. At the superior aspect of the pharynx (bottom of the screen) is the inferior aspect of the soft palate with the dangling uvula. The mean minimum width for oncologic specimens was 0.76 ± 0.46 mm. The mean minimum SPC width for all cadaveric specimens was 1.02 ± 0.50 mm. Results: Six cadaveric and 10 oncologic specimens were analyzed. The thickness of the SPC muscle and relationship to the tonsillar carcinoma were assessed. Specimens were processed using standard histopathologic techniques and were analyzed by a board-certified head and neck pathologist. Methods: Radical tonsillectomy specimens were collected from cadaveric and oncologic subjects. 4) peripancreatic (head only), periduodenal, posterior pancreatoduodenal, periportal, celiac, The origin of the superior pharyngeal constrictor muscle at. Objective: The aim of this study was to characterize the gross and histologic anatomic features of the palatine tonsil and SPC muscle following an en bloc radical tonsillectomy. The oncologic margin may be significantly influenced by the morphologic relations and anatomic dimensions of the palatine tonsil and superior pharyngeal constrictor (SPC) muscle. Introduction: The rise in primary surgical management of oropharyngeal squamous cell carcinoma has led to varying interpretations of the histopathologic evaluation following a radical tonsillectomy.
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