Liver mass staging
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Liver Mass Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Liver mass staging On the Web |
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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.
| Staging factor | Stage | Description | |
|---|---|---|---|
| Size | 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 | ||