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Computed tomography is useful for preoperative identification of nonrecurrent laryngeal nerve in thyroid cancer patients.

 Yong Sang Lee  ;  Eun Ju Son  ;  Hang-Seok Chang  ;  Woong Youn Chung  ;  Kee-Hyun Nam  ;  Cheong Soo Park 
 OTOLARYNGOLOGY-HEAD AND NECK SURGERY, Vol.145(2) : 204-207, 2011 
Journal Title
Issue Date
Adult ; Aged ; Cranial Nerve Diseases/complications ; Cranial Nerve Diseases/congenital* ; Cranial Nerve Diseases/diagnostic imaging ; Female ; Follow-Up Studies ; Humans ; Laryngeal Nerve Injuries/etiology ; Laryngeal Nerve Injuries/prevention & control* ; Male ; Middle Aged ; Preoperative Care/methods* ; Recurrent Laryngeal Nerve/abnormalities* ; Recurrent Laryngeal Nerve/diagnostic imaging ; Reproducibility of Results ; Retrospective Studies ; Thyroid Neoplasms/complications ; Thyroid Neoplasms/diagnostic imaging* ; Thyroid Neoplasms/surgery ; Thyroidectomy/adverse effects ; Thyroidectomy/methods* ; Tomography, X-Ray Computed/methods* ; Young Adult
OBJECTIVE: Nonrecurrent laryngeal nerve (NRLN) is a risk factor for nerve injury during thyroid or parathyroid surgery and is usually associated with vascular anomalies. This study investigated the usefulness of computed tomography (CT) scans for preoperative identification of NRLN in thyroid cancer patients. STUDY DESIGN: Case series with chart review. SETTING: Academic university hospital. SUBJECTS AND METHODS: Of the 6546 patients, 20 (0.3%) were intraoperatively identified with NRLN, and the medical records of 20 patients were reviewed retrospectively, with particular focus on preoperative CT findings. RESULTS: All 20 cases were right-sided NRLN, and no clinical symptoms were observed preoperatively in any patient. Two patients had type I NRLN and 18 had type II NRLN. NRLN injury occurred in 1 patient at a point where the nerve was close to the superior thyroid artery. Prior to surgery, surgeons identified only 5 suspected NRLN cases based on identification of vascular anomalies on CT scans. However, this review of CT scans revealed that vascular anomalies could be identified on the scans of all patients. CONCLUSIONS: Neck CT scanning appears to be an excellent method for predicting NRLN cases. However, thorough examination of the scans, with particular attention to the neck and mediastinum vascular structures, is required.
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1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Surgery (외과학교실) > 1. Journal Papers
Yonsei Authors
Nam, Kee Hyun(남기현) ORCID logo https://orcid.org/0000-0002-6852-1190
Park, Cheong Soo(박정수)
Son, Eun Ju(손은주) ORCID logo https://orcid.org/0000-0002-7895-0335
Lee, Yong Sang(이용상) ORCID logo https://orcid.org/0000-0002-8234-8718
Chang, Hang Seok(장항석) ORCID logo https://orcid.org/0000-0002-5162-103X
Chung, Woung Youn(정웅윤)
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