Liver mass staging
Liver Mass Microchapters |
Diagnosis |
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Treatment |
Case Studies |
Liver mass staging On the Web |
American Roentgen Ray Society Images of Liver mass staging |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Maria Fernanda Villarreal, M.D. [2]
Overview
According to the American Joint Committee on Cancer (AJCC) staging system, there are 4 stages of malignant liver mass, based on 3 factors: tumor size, lymph node invasion, and metastasis. Each stage is assigned a letter and a number that designate T for tumor size, N for node invasion, and M for metastasis. There is no staging for benign lesions.[1]
Staging
The table below summarizes the staging system for malignant liver mass, based on 3 factors: tumor size, lymph node invasion, and metastasis.
Size | ||
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TX | Primary tumor cannot be assessed | |
T0 | No evidence of primary tumour | |
T1 | A single tumor with no invasion into the blood vessels of the liver | |
T2 | A single tumor with invasion into the blood vessels or multiple tumors, none more than 5 cm in size | |
T3 | T3a | Multiple tumors, with any tumor larger than 5 cm |
T3b | The tumour has grown into either the portal or hepatic vein | |
T4 | The tumor has grown into nearby organs (other than the gallbladder) or
The tumour has grown into the layer of tissue that covers the organs in the abdomen (visceral peritoneum) | |
Nodes | ||
NX | Regional lymph nodes cannot be assessed | |
N0 | No regional lymph node metastasis | |
N1 | Regional lymph node metastasis | |
Metastasis | ||
M0 | No distant metastasis | |
M1 | Distant metastasis |