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良性泪腺混合瘤多发于青年,病程长,很少恶性变。如手术摘除不完全很易复发。生长速度突然加快,就有恶性变的可能。恶性泪腺混合瘤占所有泪腺上皮性肿瘤的4%-12%。组织学特点为部分呈良性泪腺混合瘤,他部分恶性变。典型的恶性变为腺癌及囊性腺样癌;个别与鳞癌、皮脂腺癌及肉瘤相似。本文报告诊断困难的2例:一例为73岁白人女性,发现左眼球轻度向鼻下方突出已8年,颞上眶部可扪及一坚硬肿物,CT扫描显示在泪腺处有一界限清楚的卵圆形肿物,有钙化,诊断为
Benign mixed tumors of the lacrimal gland often occur in young people and have a long course of disease and rarely become malignant. Such as surgical removal is not completely easy to relapse. When the growth rate suddenly increases, there is the possibility of malignancy. Malignant lacrimal gland mixed tumors account for 4%-12% of all lacrimal gland epithelial tumors. The histological features were some mixed tumors with benign lacrimal glands, and he was partially malignant. The typical malignancy becomes adenocarcinoma and cystic adenoid carcinoma; individual is similar to squamous cell carcinoma, sebaceous gland carcinoma and sarcoma. This article reports two cases of difficult diagnosis: One case is a 73-year-old white female. It was found that the left eyeball has slightly protruded below the nose for 8 years, and the upper eyelid may have a hard mass. The CT scan showed a clear boundary in the tear gland. Oval mass, calcified, diagnosed as