And obvious degranulation can be seen.Electric microscopy shows that mast cells are round, oval and spindle-shape.In lesion partial and complete degranulaion can be seen.

• 电镜结果显示肥大细胞呈圈形、椭圆形或梭形，病变黏膜组织中肥大细胞部分呈空泡状，即完全性脱颗粒，部分颗粒内残留一些物质，即部分性脱颗粒。