Non-specific invasive carcinoma is a pathological classification of breast cancer, and grade 2 is the pathological grade of breast cancer. Non-specific invasive carcinoma is a kind of pathological diagnosis of breast cancer, and the more common non-specific breast cancer in clinical practice nowadays is invasive ductal carcinoma, whose pathological grading includes grade 1, grade 2 and grade 3. Non-specific invasive carcinoma grade 2 is suggestive of breast cancer in middle and late stages, with pathological features of low differentiation of tumor cells, mostly at middle differentiation level, high malignancy, which may be accompanied by metastasis to lymph nodes or neighboring organs, such as lungs, livers and bones. Breast cancer is a common and highly malignant tumor disease that can occur in both men and women, with a higher incidence rate in women. It is recommended that patients should go to regular hospitals as early as possible when they have unexplained lumps in the breast area, nipple blood and fluid overflow, or enlarged lymph nodes in the armpit, and receive standardized diagnosis and treatment under the guidance of specialists, and follow up on a regular basis.