A degenerating cyst is usually collapsed and surrounded by inflammatory exudate and fibrous connective tissue. 退化的包囊通常萎陷，并被炎性渗出物和纤维结缔组织所包围。
It is this marked increase in the dense fibrous tissue stroma that produces the characteristic hard "scirrhous" appearance of the typical infiltrating ductal carcinoma. 致密的纤维结缔组织间质的显著增生造成了典型浸润性导管癌的特征性病变硬癌特征。
