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Martínez-Sanz E, Catón J, Maldonado E, Murillo-González J, Barrio MC, Paradas-Lara I, García-Serradilla M, Arráez-Aybar L, Mérida-Velasco JR. Study of the functional relationships between the buccinator muscle and the connective tissue of the cheek in humans. Ann Anat 2023; 246:152025. [PMID: 36375681 DOI: 10.1016/j.aanat.2022.152025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 10/17/2022] [Accepted: 11/02/2022] [Indexed: 11/13/2022]
Abstract
BACKGROUND The buccinator muscle derives from the mesenchyme of the second pharyngeal arch. In adults, it has a quadrilateral shape, occupying the deepest part of the cheek region. Its function is complex, being active during swallowing, chewing, and sucking. To our knowledge, there are no studies that have specifically analyzed the relationship of the buccinator muscle fibers and neighboring connective tissue of the cheek in humans, neither during development nor in adults. Such relationships are fundamental to understand its function. Thus, in this study the relations of the buccinator muscle with associated connective tissue were investigated. METHODS The buccinator muscle region was investigated bilaterally in 41 human specimens of 8-17 weeks of development. Moreover, four complete adult tissue blocks from human cadavers (including mucosa and skin) were obtained from the cheek region (between the anterior border of the masseter muscle and the nasolabial fold). All samples were processed with standard histological techniques. In addition, subsets of sections were stained with picrosirius red (PSR). Furthermore, immunoreactivity against type I and III collagen was also studied in adult tissues. RESULTS The buccinator muscle showed direct relationships with its connective tissue from 8 to 17 weeks of development. Collagen fibers were arranged in septa from the submucosa to the skin through the muscle. These septa were positive for type I collagen and presented elastic fibers. Fibrous septa that were positive for type III collagen were arranged from the lateral side of the muscle to the skin. CONCLUSIONS The intimate relationship between buccinator muscle fibers and cheek connective tissue may explain the complex functions of this muscle.
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Affiliation(s)
- Elena Martínez-Sanz
- Department of Anatomy and Embryology, Faculty of Medicine, Complutense University of Madrid, Plaza de Ramón y Cajal, s/n, Ciudad Universitaria, 28040 Madrid, Spain
| | - Javier Catón
- Department of Anatomy and Embryology, Faculty of Medicine, Complutense University of Madrid, Plaza de Ramón y Cajal, s/n, Ciudad Universitaria, 28040 Madrid, Spain.
| | - Estela Maldonado
- Department of Anatomy and Embryology, Faculty of Medicine, Complutense University of Madrid, Plaza de Ramón y Cajal, s/n, Ciudad Universitaria, 28040 Madrid, Spain
| | - Jorge Murillo-González
- Department of Anatomy and Embryology, Faculty of Medicine, Complutense University of Madrid, Plaza de Ramón y Cajal, s/n, Ciudad Universitaria, 28040 Madrid, Spain
| | - María Carmen Barrio
- Department of Anatomy and Embryology, Faculty of Optics and Optometry, Complutense University of Madrid, Calle de Arcos de Jalón, 118, 28037 Madrid, Spain
| | - Irene Paradas-Lara
- Department of Anatomy and Embryology, Faculty of Optics and Optometry, Complutense University of Madrid, Calle de Arcos de Jalón, 118, 28037 Madrid, Spain
| | - Moisés García-Serradilla
- Department of Anatomy and Embryology, Faculty of Optics and Optometry, Complutense University of Madrid, Calle de Arcos de Jalón, 118, 28037 Madrid, Spain
| | - Luis Arráez-Aybar
- Department of Anatomy and Embryology, Faculty of Medicine, Complutense University of Madrid, Plaza de Ramón y Cajal, s/n, Ciudad Universitaria, 28040 Madrid, Spain
| | - José Ramón Mérida-Velasco
- Department of Anatomy and Embryology, Faculty of Medicine, Complutense University of Madrid, Plaza de Ramón y Cajal, s/n, Ciudad Universitaria, 28040 Madrid, Spain
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Zhong Z, Wang D, Liu Y, Shao S, Chen S, He S, Yang N, Li C, Ren J, Zhao Y, Wang Q, Wang G, Sun C, Zhang S. Lymph drainage and cervical fascia anatomy-oriented differential nodal CTV delineation at the supraclavicular region for esophageal cancer and nasopharyngeal cancer. Radiother Oncol 2022; 177:113-120. [PMID: 36336111 DOI: 10.1016/j.radonc.2022.10.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 10/05/2022] [Accepted: 10/30/2022] [Indexed: 11/05/2022]
Abstract
PURPOSE To determine the differences in supraclavicular lymph node metastasis between esophageal cancer (EC) and nasopharyngeal cancer (NPC) and explore the feasibility of differential supraclavicular clinical target volume (CTV) contouring between these two diseases based on the involvement of different fascial spaces. MATERIALS AND METHODS One hundred patients with supraclavicular nodes positive for EC or NPC were enrolled, and their pre-treatment images were reviewed. The distribution patterns of nodes between the two diseases were compared in the context of node levels defined by the 2017 Japanese Esophageal Society and 2013 International Consensus on Cervical Lymph Node Level Classification. Grouping supraclavicular nodes based on sub-compartments formed by the cervical fascia was discussed, and the feasibility of differential CTV contouring based on the differences in the involvement of these sub-compartments between EC and NPC was explored. RESULTS The 2013 Consensus on cervical node levels and 2017 Japanese Esophageal Society node station could not practically guide supraclavicular CTV contouring. We divided the supraclavicular space into six sub-compartments: the para-esophageal space (PES), carotid sheath space (CSS), sub-thyroid pre-trachea space (STPTS), pre-vascular space (PVS), and vascular lateral space (VLS) I and II. EC mainly spread to the PES, STPTS, CSS, and VLS I, whereas NPC tended to spread to the CSS, VLS I, and VLS II. These combinations of sub-compartments may help constitute the supraclavicular CTVs for EC and NPC. CONCLUSIONS The fascia anatomy-based sub-compartments sufficiently distinguished metastasis to the supraclavicular space between EC and NPC, thus facilitating differential CTV contouring between these two diseases.
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Affiliation(s)
- Zuxian Zhong
- Graduate School, Chengdu Medical College, Chengdu, China; Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, School of Medicine, University of Electronic Science and Technology of China, Sichuan Cancer Center, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China
| | - Dan Wang
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, School of Medicine, University of Electronic Science and Technology of China, Sichuan Cancer Center, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China; Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Yi Liu
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, School of Medicine, University of Electronic Science and Technology of China, Sichuan Cancer Center, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China; Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Shilong Shao
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Sihao Chen
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, School of Medicine, University of Electronic Science and Technology of China, Sichuan Cancer Center, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China; Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Shanshan He
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, School of Medicine, University of Electronic Science and Technology of China, Sichuan Cancer Center, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China; Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Ningjing Yang
- Department of Radiology, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Churong Li
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, School of Medicine, University of Electronic Science and Technology of China, Sichuan Cancer Center, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China
| | - Jing Ren
- Department of Radiology, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Yue Zhao
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, School of Medicine, University of Electronic Science and Technology of China, Sichuan Cancer Center, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China
| | - Qifeng Wang
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, School of Medicine, University of Electronic Science and Technology of China, Sichuan Cancer Center, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China
| | - Guotai Wang
- School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, China
| | - Chuntang Sun
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children(Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Shichuan Zhang
- Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, School of Medicine, University of Electronic Science and Technology of China, Sichuan Cancer Center, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China; Department of Oncology, Affiliated Hospital of Southwest Medical University, Luzhou, China.
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Muacevic A, Adler JR, Scali F. The Alar Fascia and Danger Space: A Modern Review. Cureus 2022; 14:e32871. [PMID: 36699751 PMCID: PMC9868889 DOI: 10.7759/cureus.32871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/22/2022] [Indexed: 12/24/2022] Open
Abstract
PURPOSE Given the advancements in dissection modalities over the last decade, what is the current understanding of the alar fascia and its clinical implications as an access point into the danger space (DS)? The aim of the study is to provide an updated review of the alar fascia and danger space. METHODS A comprehensive search of the alar fascia and danger space was performed through PubMed databases up to August 2022. Thirty-two sagittal E12 sheet plastination slices of the head and neck were analyzed under a stereomicroscope to assess the morphology and continuity of the retropharyngeal, alar, and prevertebral fasciae (PVF and their respective potential spaces). RESULTS Recent advancements have provided evidence that the alar fascia is a true fascial layer between the retropharyngeal and danger spaces within the deep cervical region. Although its composition, histological features, and borders remain topics of controversy, the alar fascia is comprised of dense connective tissue and may serve as a physical barrier to prevent the spread of infection into the danger space. Complications arising from deep neck infections that invade the danger space include mediastinitis, necrotizing fasciitis, and empyema. CONCLUSION A proper understanding of the anatomy, structure, function, and potential spaces is crucial to assessing the alar fascia and danger space routinely in clinical practice, especially when imaging.
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