What is In carcinoma gallbladder stage M1, which of the following lymph nodes are involved? and explain in detail?
Aoic Lymph node is NOT a regional lymph node.Any metastases detected in these lymph nodes is categorized as distant metastases 8th AJCC (2017) TNM Classification of Carcinoma Gallbladder T1a Lamina propria invasion. T1b Muscular invasion. T2 Invade the perimuscular connective tissue. T2a: Invade the perimuscular connective tissue on the peritoneal side with no extension to serosa. T2b: Invade the perimuscular connective tissue on the hepatic side with no extension into the liver. T3 Serosal perforation and/or direct invasion of the liver (regardless of extent) and/or invasion of any other single extrahepatic organ. T4 Tumor invades the main poal vein, hepatic aery or two or more extrahepatic organ. N1 Metastasis to 1-3 regional nodes. N2 Metastasis to 4 or more regional nodes. M1 Distant metastasis