Stage IIIA

**Semantic type:** Clinical Attribute

**Definition:** Locally advanced cancer that has spread to nearby organs but not to distant anatomic sites. The definition of stage IIIA depends on the particular type of cancer that it refers to; for example, for bladder cancer, stage IIIA includes: (T3a, T3b, T4a, N0, M0); (T1-T4a, N1, M0). T1: Tumor invades lamina propria (subepithelial connective tissue). T2: Tumor invades muscularis propria. T3: Tumor invades perivesical soft tissue. T3a: Tumor invades perivesical soft tissue, microscopically. T3b: Tumor invades perivesical soft tissue, macroscopically (extravesical mass). T4a: Extravesical tumor invades directly into prostatic stroma, uterus, vagina. N0: No regional lymph node metastasis. N1: Single regional lymph node metastasis in the true pelvis (perivesical, obturator, internal and external iliac, or sacral lymph node). M0: No distant metastasis. (AJCC 8th ed.)