Usefulness of Narrow-band Imaging for Detecting the Primary Tumor Site in Patients with Primary Unknown Cervical Lymph Node Metastasis

摘要: Objective: We sometimes experienced patients with primary unknown cervical lymph node metastasis. In such cases, if computed tomography, magnetic resonance imaging, laryngoscopy and gastrointestinal endoscopy cannot detect a site, there is no other effective method to identify possible tumor. investigated whether narrow-band imaging can tumor in such. Methods: Forty-six metastasis were surveyed about tumors, from January 2003 December 2006. All nodes histologically proved be squamous cell carcinoma by fine-needle aspiration cytology. Narrow-band combined magnifying was used the site head neck region esophagus. Histological analysis performed for all suspicious lesions biopsy specimen. Results: Twenty-six suspected cancerous region. Sixteen 16 (35%, 16/46) carcinoma. Ten located hypopharynx remaining six oropharynx. White light could not point out any lesion. Conclusions: cancer