<prompt> As per AJCC breast cancer staging T4 is?Distant metastasisSatellite lesionsSpread to contralateral axillary lymph nodesSentinel lymph node involvement  <response>: Ans. b Satellite lesionsRef: Schwartz 10th ed. 532ToNo evidence of primary tomorTISCarcinoma in situT1Tumor 2 cmT1aTumor 0.1 cm but 0.5 cmT1bTumor 0.5 but 1 cmT1cTumor 1 cm but 2 cmT2Tumor 2 cm but 5 cmT3Tumor 5 cmT4Extension to chest wall, inflammation, satellite lesions, ulcerations 