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对34例涎腺肌上皮瘤进行临床病理分析,其结果表明涎腺肌上皮瘤占涎腺肿瘤的2%,好发于腮腺和腭腺,男女性别无明显差异,多见于40~50岁年龄组。肿物生长缓慢,多数呈结节状,有完整包膜,未见局部侵润征象。其生物学行为为与多形性腺瘤基本相似,光镜下该肿瘤生长多为实体型,细胞形态以梭形和浆细胞样细胞多见。细胞间可见均质粉染物,PAS呈强阳性,粘液卡红弱阳性或阴性,AB呈阴性。肿瘤内尚可见粘液样和软骨样组织,PAS呈弱阳性,粘液,卡红呈弱用性或阴性,AB呈强阳性。同时有2例出现鳞状化生现象。
34 cases of salivary gland myoepithelioma and clinicopathological analysis, the results showed that salivary gland myoepithelial tumors accounted for 2% of salivary gland tumors occur in the parotid and palatal glands, no significant differences between men and women, more common in 40 to 50 years of age group. Slow growth of the tumor, the majority were nodular, complete capsule, no signs of local invasion. Its biological behavior is similar to that of pleomorphic adenoma. Under light microscopy, most of the tumor growth is solid type, and cell morphology is more common with fusiform and plasmacytoid cells. Homogeneous powdery cell intercellular visible, PAS was strongly positive, mucinous card red weak positive or negative, AB was negative. Mucous and cartilage-like tissues were still visible in the tumor. PAS was weakly positive, mucus and card red were weak or negative, and AB was strongly positive. At the same time there are 2 cases of squamous metaplasia.