By far the most common malignant neoplasm is adenocarcinoma. Bile duct cancer is more common in men: the average age at diagnosis is 60 yr. Tumors of the upper portion of the ducts (50% of all lesions) are intimately related to the liver; those of the middle portion, to the portal vein and hepalic artery; [...]
The liver is the most common site of metastasis from other cancers. Liver metastases arc found at autopsy in 30% to 50%> of patients with cancer. Primary malignancy of the liver is rare in the USA and Western Europe but common in Africa and Asia. About 90% of primary adult hepatic cancers originate in the [...]
Gallbladder malignancy has been reported in 0.2% to 5% of patients undergoing cholecystectomy, mostly women between ages 60 and 70. Adenocarcinoma accounts for 80% of gallbladder malignancies; squamous cell carcinoma and adenoacanlhoma account for the remaining 20%. Metastasis is found in 75% of cases a! the lime of diagnosis. WorkÂers in rubber and automotive plants [...]
Colorectal cancer is second only to lung cancer as the most common malignancy among US and Western European men and women. In the USA, about 150,0(10 new cases of and 60.000 deaths from (his disease occur annually. The incidence of colorectal cancer begins rising at age 40 and doubles every 5 yr thereafter, peaking in [...]
In the USA, about 24.000 new cases and 13,000 deaths from gastric cancer occur annually, and the incidence increases with age. The mean age at the time of diagnosis is 55 yr. Gastric cancer is more common in blacks and among poor socioeconomic groups; the male;female ratio is 2:1. Adenocarcinoma accounts for 95% of all [...]
