(2) mammary gland fibrosarcoma: Swollen content grows slow, it is single shot more, can show tremendous model, the surface hard pliable but strong of smooth, quality of a material, but activity.

• （2）乳腺纤维肉瘤：肿物生长缓慢，多为单发，可呈巨大型，表面光滑、质地硬韧，可活动。