title: Reply to the letter to the editor.
authors.affiliation: Associate Professor, Department of Oral and Maxillofacial Radiology, Aichi-Gakuin University School of Dentistry, Nagoya, Japan. Electronic address: yoshiko@dpc.agu.ac.jp.
authors.forename: Yoshiko
authors.initials: Y
authors.lastname: Ariji
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis / Q000000981:diagnostic imaging*; D008297:Male; D014062:Tongue Neoplasms / Q000000981:diagnostic imaging*; D018615:Ultrasonography, Doppler, Color