Mammography is a standard diagnostic tool for MCB, where the tumors will typically display as a high-density mass. However, they can also mimic IDCs as well as benign lesions in the mammogram. Sonography is also often used to help diagnose MCB, where solid and cystic components may be observed. This is related to necrosis and cystic degeneration. In Fine-needle aspiration (FNA) smears, only 57% of cases show ductal<unk>  and<unk>  components. Consequently, roughly half of MCB tumors cannot be diagnosed by FNA. Pathologic tissue diagnosis is therefore essential to distinguish MCB from other breast cancers in order to institute proper and prompt treatment. This is achieved using immunohistochemistry with a cytokeratin panel to distinguish such cases from phyllodes tumors, primary sarcomas, and fibromatoses.
Metaplastic carcinoma
Anaplastic carcinoma
Verrucous carcinoma
Adenosquamous carcinoma
Spindle cell carcinoma
Mucinous carcinoma
Adenosarcoma
Mucoepidermoid carcinoma