Yasuhisa Shinozaki1, Yoshinori Jinbu2, Hiroto Ito2, Tadahide Noguchi2, Mikio Kusama2, Naoyuki Matsumoto3, Kazuo Komiyama3, Nobuyuki Taniguchi4. 1. Department of Oral and Maxillofacial Surgery, Jichi Medical University, Shimotsuke, Tochigi, Japan. Electronic address: zackey@jichi.ac.jp. 2. Department of Oral and Maxillofacial Surgery, Jichi Medical University, Shimotsuke, Tochigi, Japan. 3. Department of Pathology, Nihon University School of Dentistry, Tokyo, Japan. 4. Clinical Laboratory Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan.
Abstract
OBJECTIVE: To clarify whether intraoral ultrasonography (I-US) is effective for predicting metastasis of tongue cancer to the cervical lymph nodes. STUDY DESIGN: Participants comprised 29 patients with tongue carcinoma classified as T1-T4 using the TNM staging system. All patients underwent I-US preoperatively. Postoperatively, resected specimens were evaluated histopathologically. RESULTS: I-US found that cases with invasive depth ≥3 mm had higher potential for cervical lymph node metastasis than those with invasive depth <3 mm (P < .05). No other significant relationships were identified between observations on I-US and cervical lymph node metastasis. Cases with histopathologic blood vessel infiltration or lymph duct infiltration had a significant difference in risk of cervical lymph node metastasis. CONCLUSIONS: I-US is useful for preoperatively assessing the invasive depth of tongue carcinoma. Furthermore, observations from I-US and invasive depth of the tumor allowed presumptive diagnosis with regard to cervical lymph node metastasis.
OBJECTIVE: To clarify whether intraoral ultrasonography (I-US) is effective for predicting metastasis of tongue cancer to the cervical lymph nodes. STUDY DESIGN:Participants comprised 29 patients with tongue carcinoma classified as T1-T4 using the TNM staging system. All patients underwent I-US preoperatively. Postoperatively, resected specimens were evaluated histopathologically. RESULTS: I-US found that cases with invasive depth ≥3 mm had higher potential for cervical lymph node metastasis than those with invasive depth <3 mm (P < .05). No other significant relationships were identified between observations on I-US and cervical lymph node metastasis. Cases with histopathologic blood vessel infiltration or lymph duct infiltration had a significant difference in risk of cervical lymph node metastasis. CONCLUSIONS: I-US is useful for preoperatively assessing the invasive depth of tongue carcinoma. Furthermore, observations from I-US and invasive depth of the tumor allowed presumptive diagnosis with regard to cervical lymph node metastasis.