Invasive ductal carcinoma is the most common type of breast cancer, which is generally of higher malignant degree and faster progressing.
It often presents as a breast lump, which is usually not hard and irregular in shape, and may be accompanied by characteristic changes of breast skin, such as dimple sign and orange peel appearance, etc. Sometimes, nipple discharge or blood spillage may also occur.
The lumps are usually irregular or nodular in shape, and their sections may be depressed, interspersed with yellowish-white streaks, gravelly, lobulated, and burred.
It is most common in women aged 40-60, and is often found by touching or imaging examination, but when the diagnosis is finalized, biopsy of the lesion should be taken for pathological examination. The prognosis of invasive ductal carcinoma is usually related to the tissue grade, lymph node metastasis, tumor size and volume, depth of vascular infiltration, and the ER gene, PR gene, and Her-2 gene.