唾液腺のClear Cell Tumor—3症例の臨床像，病理組織像について

Clear Cell Tumor of Salivary Gland; Clinical and Pathological Study on 3 Cases

はじめに

　唾液腺腫瘍は種類が多く，腫瘍性の筋上皮細胞が多分化能を有するため組織形態学的に多彩となり病理学的に興味深い点が多い。

　今回我々は，稀な唾液腺のclear cell tumorの3例を経験したので，その病理組織像および臨床像について検討し報告する。

Clear cell tumor of salivary gland is a rare dis-ease. Three cases of clear cell tumor (Parotis 2, Parapharynx 1) were described. Morphologically, case 1 was bimorphic variant that composed of inner layer tubules and outer layer of clear cells, while case 2 and case 3 were bimorphic variant that composed of solid nests and cords of clear cells.

In all the cases, the tumor was surrounded by a fibrous capsule, but case 1 showed invasive growth in some areas.

Two cases developed in close connection with pleomorphic adenoma and recurrence after appa-rently successful removal. We considered that the tumor is clinically malignant because of its local infiltrative growth and recurrence.