纤维间质中小导管增生显示显著的硬化性腺病，其为纤维囊性变的特征之一。虽然它是良性的，肉眼与X线看到的外观却仿佛是癌，且很难通过冰冻切片将它与癌区分开来。 Prominent sclerosing adenosis, one of the features of fibrocystic changes, is demonstrated by the appearance of a proliferation of small ducts in a fibrous stroma. Although it is benign, the gross and mammographic appearance may mimic carcinoma, and it can be difficult to distinguish from carcinoma on frozen section.