Stage IB

Invasive cancer confined to the original anatomic site of growth without lymph node involvement. The definition of stage IB depends on the particular type of cancer that it refers to; for example, for breast cancer, stage IB is defined as follows: (T0, N1mi, M0); (T1, N1mi, M0). T0: No evidence of primary tumor. T1: Tumor 20 mm or less in greatest dimension. T1 includes T1mi. T1mi: Tumor 1 mm or less in greatest dimension. N1mi: Nodal micrometastases. M0: No clinical or radiographic evidence of distant metastasis. M0 includes M0(i+); for bone cancer, stage IB is defined as follows: (T2, N0, M0, G1, G2, GX); (T3, N0, M0, G1, G2, GX). T2: Tumor more than 8 cm in greatest dimension. T3: Discontinuous tumors in the primary bone site. N0: No regional lymph node metastasis. M0: No distant metastasis. G1: Well differentiated-low grade. G2: Moderately differentiated-low grade. GX: Grade cannot be assessed. (partially adapted from AJCC 7th ed.) (NCI Thesaurus)

YOU MAY ALSO LIKE

Stage IA2 Cervical Cancer

Stage IA2 includes: T1a2, N0, M0. T1a2: Measured stromal invasion more than 3.0 mm and not more than 5.0 mm with…

Stage IA2

A stage term referring to invasive cervical cancer that is confined to the cervix without lymph node involvement. It includes: T1a2,…

Stage IA1 Cervical Cancer

Stage IA1 includes: T1a1, N0, M0. T1a1: Measured stromal invasion 3.0 mm or less in depth and 7.0 mm or less…

Stage IA1

A stage term referring to invasive cervical cancer that is confined to the cervix without lymph node involvement. It includes: T1a1,…

Stage IA Testicular Cancer

Stage IA includes: pT1, N0, M0, S0. pT1: Tumor limited to the testis and epididymis without vascular/lymphatic invasion; tumor may invade…

Stage IA soft tissue sarcoma

Stage I is divided into stages IA and IB. In stage IA, the tumor is low-grade (likely to grow and spread slowly)…