通过11例胆总管下端狭窄部组织学观察,见狭窄部具有粘膜层、粘膜下层、肌层和外膜等正常胆管壁组织结构.粘膜层上皮细胞脱落不一,残存上皮细胞75%出现复层上皮细胞化生,肌层有局限性增厚.上皮细胞化生是癌变基础,应早期手术.肌层局限性增厚,可能是胆总管囊肿病因之一.%In 11 cases of congenital choledo-chal cyst, the stenosis part of the distal common bile duct was studied histologically with light microscope and one with electron microscope. Stratified metaplasia was found in 75% of cases, supposed to be responsible for the possible malignant change. And hypertrophy of the musculatures was found in all cases, which suggests it be one of the etiological factors of the congenital chpledochal cyst.
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