中溝　宗永    Department   School of Medicine(Tokyo Women's Medical University Hospital), School of Medicine    Position   Professor (Fixed Term)
Article types	Original article
Language	English
Peer review	Peer reviewed
Title	Ultrasonographic demonstration of retropharyngeal lymph nodes: preliminary report.
Journal	Formal name：Ultrasound in medicine & biology Abbreviation：Ultrasound Med Biol ISSN code：03015629/03015629
Domestic / Foregin	Foregin
Volume, Issue, Page	29(5),pp.633-636
Author and coauthor	MIYASHITA Tsuguhiro, TATENO Atsushi, ABLIMIT Iskandar, NAKAMIZO Munenaga, KUMAZAKI Tatsuo, YAGI Toshiaki
Publication date	2003/05
Summary	The aim of this study was to describe the results of ultrasonography of upper retropharyngeal lymph node (RPN) metastasis in patients with pharyngeal carcinomas. A total of 10 patients with metastatic RPN were examined using percutaneous ultrasound (US) with 3.5-MHz probes. Primary cancer sites were the nasopharynx in two patients, the oropharynx in three and the hypopharynx in five. Metastatic RPNs lay in the level of occipital bone in five patients, C1 in nine, and C2 in five. US images were compared with previously obtained computerized tomography (CT) images based on size and depth. In all of the 10 patients, metastatic RPNs were ultrasonographically demonstrated as hypoechoic masses. Nodal sizes ranged from 1.5 cm to 3.5 cm both in CT and in US. Depths of the RPN centers were from 3.5 cm to 7.0 cm in CT, and from 3.5 cm to 6.5 cm in US. Differences of sizes and depths between CT and US were from -0.5 cm to 0.5 cm and from 0.0 cm to 1.0 cm, respectively. RPNs that are 1.5 cm or more in size can be demonstrated with percutaneous US using CT guidance. This technique should be utilized for the purpose of monitoring in a radiation therapy setting.
DOI	10.1016/s0301-5629(03)00011-5
PMID	12754061