遗传性出血性毛细血管扩张症5例,均有鼻衄史,2例局部病变行透射电镜检查,2例唇部和手部病变的光镜和电镜检查结果。例1唇部组织光镜下见毛细血管窦状扩张、血管壁菲薄,且不连续。例2织手部送检组织见上皮下为固有层,为致密结缔组结。有乳头伸向上皮层,乳头中含毛细血管,毛细血管由内皮细 Hereditary hemorrhagic telangiectasia in 5 cases, history of epistaxis, 2 cases of local lesions underwent transmission electron microscopy, 2 cases of lip and hand lesions by light and electron microscopy results. Example 1 lip tissue under the light microscope, see sinus capillary dilatation, vascular wall thin, and not continuous. Example 2 weaving hands to see the subcutaneous tissue for the lamina propria, dense connective tissue. Teat extends to the cortex, the nipple contains capillaries, capillaries by the endothelium thin