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Obata K, Kitagawa N, Ono K, Kanemoto H, Fukino K, Takeshita Y, Ibaragi S, Tubbs RS, Iwanaga J. Mylohyoid Muscle: Current Understanding for Clinical Management Part II: Clinical Anatomy, Radiology, and Surgical/Clinical Relevance. J Craniofac Surg 2024; 35:256-260. [PMID: 37948627 DOI: 10.1097/scs.0000000000009797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 08/21/2023] [Indexed: 11/12/2023] Open
Abstract
The mylohyoid is one of the suprahyoid muscles along with the geniohyoid, digastric, and stylohyoid muscles that lies between the anterior belly of the digastric muscle inferiorly and the geniohyoid superiorly. In Part II, the radiology and clinical/surgical importance of the mylohyoid muscle will be discussed.
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Affiliation(s)
- Kyoichi Obata
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Norio Kitagawa
- Department of Oral and Maxillofacial Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kisho Ono
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Hideka Kanemoto
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Keiko Fukino
- Department of Oral and Maxillofacial Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yohei Takeshita
- Department of Oral and Maxillofacial Radiology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Soichiro Ibaragi
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - R Shane Tubbs
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine
- Department of Neurology, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine
- Department of Structural & Cellular Biology, Tulane University School of Medicine, New Orleans, LA
- Department of Anatomical Sciences, St. George's University, St. George's, Grenada
- Department of Surgery, Tulane University School of Medicine
- Department of Neurosurgery and Ochsner Neuroscience Institute, Ochsner Health System, New Orleans, LA
- University of Queensland, Brisbane, Australia
| | - Joe Iwanaga
- Department of Oral and Maxillofacial Anatomy, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- Department of Neurosurgery, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine
- Department of Neurology, Tulane Center for Clinical Neurosciences, Tulane University School of Medicine
- Department of Structural & Cellular Biology, Tulane University School of Medicine, New Orleans, LA
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Kim H, Woo SH. Endoscopically-Assisted Scar-Free Midline Neck Mass Excision. Clin Exp Otorhinolaryngol 2021; 14:251-258. [PMID: 34407369 PMCID: PMC8373841 DOI: 10.21053/ceo.2020.02446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Accepted: 06/25/2021] [Indexed: 11/22/2022] Open
Abstract
Traditional open surgery is indicated for the treatment of selected tumor subsites in the head and neck. However, it can cause major cosmetic problems and functional pathologies. The endoscopically-assisted transoral approach is increasingly preferred in some surgical fields due to its superior cosmetic and functional outcomes. Nonetheless, endoscopically-assisted transoral approach is not yet standard in the head and neck due to their anatomical complexity. The transoral surgical approach has been used for head and neck masses since the 1960s, and its application continues to evolve with changing disease conditions and recent innovations in surgical instruments. The potential for wide application of transoral surgery continues to be investigated, with a focus on minimizing occurrence of the complications. This review presents details of the surgical procedure and postoperative clinical outcomes, as well as endoscopically-assisted scar-free techniques for the resection of midline neck masses.
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Affiliation(s)
- Hyoyeon Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Dankook University College of Medicine, Cheonan, Korea
| | - Seung Hoon Woo
- Department of Otorhinolaryngology-Head and Neck Surgery, Dankook University College of Medicine, Cheonan, Korea
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Iwai T, Sugiyama S, Kitajima H, Hirota M, Mitsudo K. Endoscopically Assisted Intraoral Removal of Infrageniohyoid Dermoid Cyst. EAR, NOSE & THROAT JOURNAL 2020; 101:30-32. [PMID: 32659119 DOI: 10.1177/0145561320940060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Toshinori Iwai
- Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Hospital, Kanazawa-ku, Yokohama, Kanagawa, Japan
| | - Satomi Sugiyama
- Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Hospital, Kanazawa-ku, Yokohama, Kanagawa, Japan
| | - Hiroaki Kitajima
- Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Hospital, Kanazawa-ku, Yokohama, Kanagawa, Japan
| | - Makoto Hirota
- Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Medical Center, Minami-ku, Yokohama, Kanagawa, Japan
| | - Kenji Mitsudo
- Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Hospital, Kanazawa-ku, Yokohama, Kanagawa, Japan
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Endoscope-assisted hairline approach for resecting maxillofacial masses. Int J Oral Maxillofac Surg 2020; 49:310-316. [DOI: 10.1016/j.ijom.2019.06.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/28/2019] [Accepted: 06/18/2019] [Indexed: 11/20/2022]
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Anatomical study of gasless transoral thyroidectomy and clinical application. Surg Endosc 2019; 34:3414-3423. [PMID: 31531736 DOI: 10.1007/s00464-019-07117-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 09/04/2019] [Indexed: 12/31/2022]
Abstract
BACKGROUND Transoral thyroidectomy is becoming a preferred technique because it has the advantage of not leaving a scar after surgery. However, it is not yet standard because of the anatomic nerve complexity of this oral cavity and difficulty of approach. The aim of this study was to determine the safety zone of a gasless transoral thyroidectomy approach using an anatomical study and to evaluate the efficacy of this approach on clinical application. METHODS Phase 1, twenty unilateral specimens from fresh cadavers underwent staining by the modified Sihler's method to identify nerves around the oral vestibules. Then, the safety zone of the transoral thyroidectomy approach was proposed. Phase 2, a comparative analysis of the clinical outcomes of gasless transoral thyroidectomy through the safety zone versus transcutaneous thyroidectomy approach. RESULTS In phase 1, numerous inferior labial branches diverged from the mental nerve and were distributed across the lower lip. In most cases, the most lateral branch reached almost to the corner of the mouth, whereas a nerve-free area was present at the medial region of the lower lip. The suggested safety zone was presented as a trapezoid shape. In phase 2, there were no significant differences in age, mass size, or complications between the two groups. However, the operation time in the transoral thyroidectomy group was longer than in the transcutaneous group (p = 0.001). CONCLUSIONS Based on the anatomical study, we suggested a safety zone for the gasless transoral thyroidectomy. On application of this safety zone, gasless transoral thyroidectomy is a safe and feasible procedure.
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Kim JP, Lee DK, Moon JH, Ryu JS, Woo SH. Endoscope‐assisted transoral accessory parotid mass excision: Multicenter prospective observational study. Laryngoscope 2019; 130:1218-1226. [DOI: 10.1002/lary.28190] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 05/20/2019] [Accepted: 07/02/2019] [Indexed: 02/03/2023]
Affiliation(s)
- Jin Pyeong Kim
- Department of OtolaryngologyGyeongsang National University Hospital Changwon Republic of Korea
- Institute of Health Sciences, Gyeongsang National University Jinju Republic of Korea
| | - Dong Kun Lee
- Department of Otolaryngology–Head and Neck SurgeryDong‐A University College of Medicine Busan Republic of Korea
| | - Jeong Hwan Moon
- Department of OtorhinolaryngologyNational Cancer Center Ilsan Republic of Korea
| | - Jun Sun Ryu
- Head and Neck Oncology ClinicNational Cancer Center Ilsan
| | - Seung Hoon Woo
- Department of Otolaryngology–Head and Neck surgeryDankook University College of Medicine Cheonan Republic of Korea
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Kim JP, Lee DK, Moon JH, Park JJ, Woo SH. Transoral Dermoid Cyst Excision: A Multicenter Prospective Observational Study. Otolaryngol Head Neck Surg 2018; 159:981-986. [PMID: 30149779 DOI: 10.1177/0194599818791772] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Transoral surgery is becoming a preferred technique because it does not leave any scar after surgery. However, transoral surgery for a dermoid cyst of the oral cavity is not standardized yet, due to the anatomic complexity of this region. The aim of this study was to evaluate the safety and efficacy of a transoral dermoid cyst excision. STUDY DESIGN Multicenter prospective observational study. SETTING University hospital. SUBJECTS AND METHODS This study was designed as a 4-year prospective multicenter evaluation of dermoid cyst excisions within the floor of mouth. Clinical outcomes and complications related to procedures were evaluated among patients. The primary outcome was the efficacy of the procedure, and the secondary outcome was cosmetic satisfaction of each procedure. RESULTS Twenty-one patients underwent transoral dermoid cyst excisions, and 22 underwent transcervical excisions. In the transoral surgery group, the mean size of the dermoid cyst was 5.35 cm (95% CI, 4.79-5.91), and in the transcervical surgery group, it was 6.19 cm (95% CI, 5.67-6.71). There was no significant differences with respect to overall demographic characteristics between the groups. However, the duration of the operation was shorter with the transoral group than with the transcervical group ( P = .001), and cosmetic satisfaction was much better in the transoral group ( P < .001). CONCLUSION Transoral dermoid cyst excision is a potentially safe and effective method that can lead to easy and quick removal of an oral cavity dermoid cyst, with excellent cosmetic outcomes.
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Affiliation(s)
- Jin Pyeong Kim
- 1 Department of Otolaryngology, Gyeongsang National University, Changwon, South Korea
- 2 Institute of Health Sciences, Gyeongsang National University, Jinju, South Korea
| | - Dong Kun Lee
- 3 Department of Otolaryngology-Head and Neck Surgery, Dong-A University College of Medicine, Busan, South Korea
| | - Jeong Hwan Moon
- 4 Department of Otorhinolaryngology, Dankook University College of Medicine, Cheonan, South Korea
| | - Jung Je Park
- 2 Institute of Health Sciences, Gyeongsang National University, Jinju, South Korea
- 5 Department of Otorhinolaryngology-Head and Neck Surgery, Gyeongsang National University, Jinju, South Korea
| | - Seung Hoon Woo
- 2 Institute of Health Sciences, Gyeongsang National University, Jinju, South Korea
- 5 Department of Otorhinolaryngology-Head and Neck Surgery, Gyeongsang National University, Jinju, South Korea
- 6 Beckman Laser Institute, University of California, Irvine, California, USA
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Abstract
BACKGROUND No-scar transoral thyroglossal duct cyst (TGDC) excision is a newly developed treatment for TGDC, but limited information is available regarding the clinical outcomes in children. The aim of this study was to evaluate the safety, efficacy, and effects of transoral TGDC excision in children. METHODS Forty-four children <10 years of age received operative treatment for TGDC from January 2013 to December 2014, and follow-up was performed over 24 months. Clinicopathologic, surgical, and follow-up data were collected and analyzed. The primary outcome variable was feasibility of the procedure, and the secondary outcome was patient's cosmetic satisfaction after each operation. RESULTS Twenty-one patients underwent transoral TGDC excision, and 21 patients underwent conventional excision. No significant differences were observed between the two groups in terms of the overall patient and operation factors. However, the rate of identifying the thyroglossal duct during transoral excision was superior to that during conventional excision (p < 0.05), and cosmetic satisfaction was much better in the transoral TGDC excision group (p < 0.001). CONCLUSION No-scar transoral TGDC excision in children is a potentially safe and effective methodology that can achieve easy removal of the thyroglossal duct and excellent cosmetic outcomes.
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Affiliation(s)
- Jin Pyeong Kim
- Department of Otolaryngology—Head and Neck Surgery, Gyeongsang National University, Jinju, Korea
| | - Jung Je Park
- Department of Otolaryngology—Head and Neck Surgery, Gyeongsang National University, Jinju, Korea
| | - Seung Hoon Woo
- Department of Otolaryngology—Head and Neck Surgery, Gyeongsang National University, Jinju, Korea
- Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
- Beckman Laser Institute, University of California, Irvine, California
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Woo SH, Park JJ, Kwon M, Pyeong Kim J. “Hidden scar” submandibular gland excision using an endoscope-assisted hairline approach. Oral Oncol 2017; 65:83-88. [DOI: 10.1016/j.oraloncology.2016.12.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 12/16/2016] [Accepted: 12/17/2016] [Indexed: 10/20/2022]
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Woo SH, Park JJ, Hong JC, Wang SG, Park GC, Eun YG, Kim JP, Jeong HS. Endoscope-assisted transoral removal of a thyroglossal duct cyst using a frenotomy incision: A prospective clinical trial. Laryngoscope 2015; 125:2730-5. [DOI: 10.1002/lary.25508] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 06/02/2015] [Accepted: 06/22/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Seung Hoon Woo
- Department of Otolaryngology; Gyeongsang National University; Jinju Korea
- Institute of Health Sciences, Gyeongsang National University; Jinju Korea
| | - Jung Je Park
- Department of Otolaryngology; Gyeongsang National University; Jinju Korea
| | - Jong Chul Hong
- Department of Otorhinolaryngology-Head and Neck Surgery; Dong-A University Hospital; Busan Korea
| | - Soo-Geun Wang
- Department of Otorhinolaryngology-Head and Neck Surgery; Busan National University School of Medicine; Busan Korea
| | - Gi Cheol Park
- Department of Otolaryngology; Samsung Changwon Hospital, Sungkyunkwan University School of Medicine; Changwon Korea
| | - Young Gyu Eun
- Department of Otolaryngology; Kyung Hee University School of Medicine; Seoul Korea
| | - Jin Pyeong Kim
- Department of Otolaryngology; Gyeongsang National University; Jinju Korea
| | - Han-Sin Jeong
- Department of Otorhinolaryngology-Head and Neck Surgery; Sungkyunkwan University School of Medicine, Samsung Medical Center; Seoul Korea
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Woo SH. Endoscope-assisted transoral accessory parotid mass excision. Head Neck 2015; 38:E7-12. [DOI: 10.1002/hed.24092] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/14/2015] [Indexed: 12/11/2022] Open
Affiliation(s)
- Seung Hoon Woo
- Department of Otorhinolaryngology; Gyeongsang National University; Jinju Korea
- Institute of Health Sciences; Gyeongsang National University; Jinju Korea
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Woo SH, Kim JP, Baek CH. Endoscope-assisted extracapsular dissection of benign parotid tumors using hairline incision. Head Neck 2015; 38:375-9. [DOI: 10.1002/hed.23901] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Revised: 07/22/2014] [Accepted: 10/24/2014] [Indexed: 11/09/2022] Open
Affiliation(s)
- Seung Hoon Woo
- Department of Otolaryngology; Gyeongsang National University; Jinju Korea
- Institute of Health Sciences; Gyeongsang National University; Jinju Korea
| | - Jin Pyeong Kim
- Department of Otolaryngology; Gyeongsang National University; Jinju Korea
| | - Chung-Hwan Baek
- Department of Otorhinolaryngology - Head and Neck Surgery; Sungkyunkwan University School of Medicine, Samsung Medical Center; Seoul South Korea
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Endoscopic-Assisted Total Thyroidectomy via Lateral Keloid Scar Incision. Clin Exp Otorhinolaryngol 2014; 7:338-41. [PMID: 25436057 PMCID: PMC4240495 DOI: 10.3342/ceo.2014.7.4.338] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 11/08/2013] [Accepted: 11/09/2013] [Indexed: 11/08/2022] Open
Abstract
Thyroidectomy is traditionally performed by the transcervical approach. To avoid or reduce visible scarring, diverse innovative surgical trials have been reported. Here we report a patient who underwent endoscopic thyroidectomy via a lateral keloid scar due to a previous traffic accident. A 30-year-old woman presented with a papillary thyroid carcinoma. Total thyroidectomy was performed via a keloid scar incision. The keloid scar was then revised. The total thyroidectomy was successful, resulting in no acute complications, such as neural injury, hematoma, or seroma formation. The keloid scar healed with excellent cosmetic results and the patient remains free of disease 12 months after excision. Endoscopic total thyroidectomy via a lateral keloid scar incision healed not only the physical disease but also the mental disease.
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Woo SH. Endoscope-Assisted Transoral Thyroidectomy Using a Frenotomy Incision. J Laparoendosc Adv Surg Tech A 2014; 24:345-9. [DOI: 10.1089/lap.2014.0110] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Seung Hoon Woo
- Department of Otolaryngology and Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
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