Gallbladder, 1. The occurrence of extrahepatic bile duct cancer site. In anatomy, according to the site of cancer, extrahepatic bile duct cancer can be divided into: left and right hepatic duct carcinoma; hepatic duct cancer; cystic duct carcinoma; hepatic duct, cystic duct and common bile duct confluence of the cancer; bile Explorer cancer.
Gallbladder 2. Extrahepatic bile duct cancer histological types: according to cancer type, cancer differentiation and growth pattern. Extrahepatic bile duct cancer can be divided into the following six types: papillary adenocarcinoma: In addition to the individual for the type of wall invasion, almost all endovascular papillary type. adenocarcinoma: in cholangiocarcinoma in most, can account for 2 / 3 or more, can be found in any part of. Cancer were invasive growth within the wall, surrounded by the wall. Invasive cancer tissues were different sizes, shapes, irregular glandular structures, and some were cysts can be expanded. poorly differentiated adenocarcinoma: a poorly differentiated adenocarcinoma, glandular cancer showed some structure, some of the irregular solid pieces, also the growth of diffuse infiltration within the wall. undifferentiated carcinoma: rare. Some small cell undifferentiated carcinoma, and undifferentiated carcinoma of gallbladder same cells within the diffuse infiltration in the bile duct, interstitial less. Larger cancer invasion, often can be fatty tissue around the bile duct invasion or adjacent organ. signet ring cell carcinoma: rare. It is the gastrointestinal tract and gallbladder, or signet ring cell carcinoma of the same, ranging from the differentiation of cancer cells containing mucus composition. No definite structure of cancer cells, diffuse infiltration. squamous cell carcinoma: rare. The morphology and the same as those seen in other organs.
Gallbladder 3. Extrahepatic bile duct proliferation and metastasis: early, the occurrence of metastasis less, mainly along the bile duct wall, upward, downward infiltration of direct spread. As mentioned in paragraph directly invade the liver and hepatic duct carcinoma, than in the lower cancer more common. The most common is the hilar lymph node metastasis, but also to other parts of the abdominal lymph nodes. Way to survive the transfer, except those with advanced cancer, usually less. Various parts of the bile duct, the liver the most common, especially in high bile duct cancer tissue easy to violations of portal vein tumor thrombus formation can lead to liver metastasis. But also to the adjacent organs pancreas, gallbladder metastasis.
Gallbladder 4. Extrahepatic cholangiocarcinoma in the general form: in the general form of extrahepatic bile duct cancer can be divided into three types: infiltrating wall: can be found in any part of the bile duct, the most common. The involvement of the wall thickening, can cause lumen or stenosis, thereby blocking phenomenon can occur. nodules: a more rare type of wall invasion can be seen in the later period of cholangiocarcinoma, cancer nodules of diameter 1.5 ~ 5.0cm. intraluminal papillary type: the most rare, can be found in any part of the bile duct, but more rare confluence of the Department. This type of cavity can be completely blocked bile duct. In addition to cancer growth primarily to the lumen, but also further to the infiltration of growth within the wall.