ULTRASONIC EVALUATION OF CERVICAL LYMPH NODE METASTASIS OF SQUAMOUS CELL CARCINOMA IN ORAL CAVITY

Forty-four patients with oral cancer were examined by ultrasonography to detect cervical lymph nodal metastases. The lymph nodes, which were histopathologically or clinically confirmed to have cancer metastases, showed the following characteristic echogram findings: distinctive nodal boundary, posterior echo enhancement and an increased ratio of the shortest and the longest diameters of the node.It is suggested that these three peculiar ultrasonographic findings are considered to be important items for the differential diagnosis of benign nodes from the cervical metastasis of oral cance

SURFACE ROUGHNESS OF SQUAMOUS CELL CARCINOMA OF THE ORAL MUCOSA

The surface rough ness value of 39 oral squamous cell carcinomas was measured by the Rmax method. The means of the eight measurement values of each carcinoma ranged from 87 µm to 1176 µm. The average value of all 39 lesions was 341 µm. The average value of the lesions of the papillomatous and granulomatous types was larger than that of the leukoplakic and erosive types. The lesions with the size of more than 2 cm in diameter were rougher than those of less than 2 cm. The lesions of the gingiva were rougher than those on the tongue. There was an inclination that the surface of the verrucous carcinoma was rougher than that of the invasive squamous cell carcinoma and that the surface of early carcinoma was smoother than that of the invasive squamous cell carcinoma

TRANSFERRIN RECEPTOR EXPRESSION IN ORAL TUMORS

Transferrin receptor expression in oral tumors was examined by staining with monoclonal antibody against the human transferrin receptor. The cells with positive reaction were recognized in the basal and parabasal layers of the normal epithelium. The staining was found in all the malignant tumors but not in the benign tumors. These results suggest that the immunohistochemical analysis of the transferrin receptor is useful for the diagnosis of oral malignant tumor in addition to the clinical and pathological examinations

A CASE REPORT OF PAPILLARY ADENOCARCINOMA IN SUBLINGUAL REGION: ULTRASTRUCTURAL AND HISTOCHEMICAL STUDY

A rare case of papillary adenocarcinoma located in the sublingual region is presented.This case was initially considered to be a hemangioma and then the tentative clinical diagnosis was thyroglossal duct cyst at the time of the operation under general anesthesia. However, the final histopathologic diagnosis was papillary adenocarcinoma.We investigated its origin by histological, ultrastructural and histochemical techniques and it was suggested that this tumor arose from the minor salivary gland