Table 3. Definitions of TNM Stages IIIA and IIIBa

StageTNM Description
IIIAT3, N0, M0T3 = Multiple tumors, at least one of which is >5 cm.
N0 = No regional lymph node metastasis.
M0 = No distant metastasis.
IIIBT4, N0, M0T4 = Single tumor or multiple tumors of any size involving a major branch of the portal vein or hepatic vein, or tumor(s) with direct invasion of adjacent organs other than the gallbladder or with perforation of visceral peritoneum.
N0 = No regional lymph node metastasis.
M0 = No distant metastasis.

T = primary tumor; N = regional lymph nodes; M = distant metastasis.

aReprinted with permission from AJCC: Liver. In: Amin MB, Edge SB, Greene FL, et al., eds.: AJCC Cancer Staging Manual. 8th ed. New York, NY: Springer, 2017, pp. 287–93.

From: Adult Primary Liver Cancer Treatment (PDQ®)

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PDQ Cancer Information Summaries [Internet].
Bethesda (MD): National Cancer Institute (US); 2002-.

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