耳下腺部腫瘍のCT診断
適応と限界
1980 年 83 巻 12 号 p. 1627-1634
詳細
1980 年 83 巻 12 号 p. 1627-1634
Computed Tomography (CT) was supplementary and effectively employed for diagnosis of parotid gland tumors in 33 patients. The usefulness of this technique for determing of location of tumor and for differential diagnosis was investigated. The results were as follows:
1. The depth of tumor expansion into the parapharyngeal space was clearly evaluated by CT,
2. It may be assumed that a tumor locates in the superficial lobe, if it appears outside a line drawn between the mastoid process and the mandibule.
3. If the margin of tumor appears irregular, and its content is heterogenous, diagnosis of a high-grade maligancy will be made. CT is of limited usefulness in diagnosing low-grade malignancy.
4. Clear and lowdensity of a tumor shown in CT can be suggestive of a cyst.
