The probability of malignancy of fibroma itself is relatively small, and further judgment of benignity and malignancy mainly includes the following aspects, namely, clinical examination, imaging examination, laboratory examination and pathological biopsy. 1. Clinical examination: if the lesion increases in size within a short time, has uneven edges and irregular shape, causes bloody overflow from the nipple and depressions in the neighboring skin, it has the possibility of malignancy. 2. Imaging examination: through the examination of the lesion, the tissue composition is mixed, the boundary of the lesion is unclear, the neighboring glands are structurally disorganized, the blood flow is abundant, and the dispersion of nuclear magnetic resonance examination is limited, and the corresponding condition suggests that it may belong to malignant. 3. Laboratory examination: through blood test, there is a rise in tumor marker, suggesting the possibility of malignant lesions. 4. Pathological biopsy: to finally diagnose the benign or malignant nature of the lesion, it is necessary to find malignant tumor cells through pathological biopsy, which can diagnose malignancy. Fibroid tumor with obvious pain, unclear boundary, nipple overflow, etc., need to consult doctor for observation in time, and carry out standardized treatment under the guidance of clinician after diagnosis of the disease.