Stage III includes: IIIA: (T3a, T3b, T4a, N0, M0); (T1-T4a, N1, M0); IIIB: (T1-T4a, N2, N3, 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). N2: Multiple regional lymph node metastasis in the true pelvis (perivesical, obturator, internal and external iliac, or sacral lymph node metastasis). N3: Lymph node metastasis to the common iliac lymph nodes. M0: No distant metastasis. (AJCC 8th ed.) [from NCI]