Liver mass staging
Liver Mass Microchapters
Liver mass staging On the Web
American Roentgen Ray Society Images of Liver mass staging
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.
The table below summarizes the staging system for malignant liver mass, based on 3 factors: tumor size, lymph node invasion, and metastasis.
|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|
- Assy N, Nasser G, Djibre A, Beniashvili Z, Elias S, Zidan J (2009). "Characteristics of common solid liver lesions and recommendations for diagnostic workup". World J. Gastroenterol. 15 (26): 3217–27. PMC 2710776. PMID 19598296.