Anatomic Stage IA Breast Cancer AJCC v8

**Semantic type:** Neoplastic Process

**Definition:** Stage IA includes: T1, N0, M0. T1: Tumor measuring 20 mm or less in greatest dimension. N0: No regional lymph node metastasis is identified or isolated tumor cell clusters (ITCs) are identified only. M0: No clinical or radiographic evidence of distant metastases. Imaging studies are not required to assign the M0 category. (AJCC 8th ed.)

**Synonyms:** - Anatomic Stage IA Breast Carcinoma AJCC v8 - Stage IA Breast Cancer