A female client with cancer is being evaluated for possible metastasis. Which of the following is one of the most common metastasis sites for cancer cells?
A. Liver
B. Colon
C. Reproductive tract
D. White blood cells (WBCs)
Correct Answer: A. Liver
The liver is one of the five most common cancer metastasis sites. The others are the lymph nodes, lung, bone, and brain.
Option B: The colon is a rare cancer metastasis site. The most common pathway of metastatic spreading to the bowel is through peritoneal seeding, through hematogenous and lymphatic dissemination to the colon has also been reported.
Option C: Metastasis rarely occurs in the reproductive tract. Ovary and vagina are the most frequent metastatic sites for extragenital and genital primaries.
Option D: The WBCs are occasional metastasis sites. A human metastatic tumor can arise when a leukocyte and a cancer cell fuse to form a genetic hybrid.