1Division of Oral & Medical Management, Department of Diagnostics & General Care, Section of Image Diagnostics, Fukuoka Dental College, 2Division of Biomedical Sciences, Department of Morphological Biology, Section of Pathology, Fukuoka Dental College, 3Division of Oral & Medical Management, Department of Oral & Maxillofacial Surgery, Section of Oral Oncology, Fukuoka Dental College
Purpose: To evaluate the ultrasonographic internal architecture of enlarged cervical lymphnodes from oral carcinoma using the modified complexity value (MCV), and to determine if the modified complexity value is a valid diagnostic parameter for differentiating between metastatic and nonmetastatic lymphnodes. Subjects and Methods: An ellipsoid ultrasonographic phantom and 50 enlarged cervical lymphnodes (metastasis, 27; nonmetastasis, 23) were examined with a linear ultrasound scanner. Two hundred fifty-six grayscale images were reconstructed from the 16 grayscale images. Modified complexity value was calculated by dividing the square of the total length pixels by the total area of the images at the same density level in the region of interest. Definite diagnosis of the nodes was obtained by histologic examination after neck dissection. Results and Discussion: Modified complexity values under different conditions of the phantom did not differ from one another. The sum of the modified complexity values of the metastatic lymphnodes was higher than that of the nonmetastatic lymphnodes. Conclusion: The modified complexity value of the lymphnode ultrasonogram is a useful parameter for differentiating between metastatic and nonmetastatic enlargement in cervical lymphadenopathy in the oral carcinoma.