Multiple hepatic mets is seen in:
**Question:** Multiple hepatic mets is seen in:
A. Breast cancer
B. Lung cancer
C. Prostate cancer
D. Colorectal cancer
**Core Concept:** Multiple liver lesions in patients with cancer often represent distant organ involvement by the primary tumor. Liver is a common site for tumor spread due to its rich blood supply and immune privilege.
**Why the Correct Answer is Right:** Liver is a frequent site for hematogenous spread of cancer cells, particularly in patients with primary tumors from colorectal, breast, lung, and prostate cancers. In the case of colorectal cancer, liver mets occur in up to 50% of cases due to the rich blood supply and portally-drained nature of the liver.
**Why Each Wrong Option is Incorrect:**
A. Breast cancer: Breast cancer typically spreads to distant lymph nodes, bones, and lungs, rather than the liver.
B. Lung cancer: Lung cancer primarily spreads to the brain, bones, adrenals, and occasionally the liver.
C. Prostate cancer: Prostate cancer primarily spreads to the bones, lymph nodes, and rarely the liver.
**Clinical Pearl:** The presence of multiple liver lesions in patients with a known history of cancer should raise suspicion for the involvement of the liver by the primary tumor. A detailed clinical history, physical examination, and appropriate imaging studies are necessary to confirm the diagnosis and identify the primary site.
**Correct Answer:** D. Colorectal cancer
**Why the Correct Answer is Right:** Multiple hepatic mets are commonly seen in colorectal cancer, as mentioned above. This is due to the liver's rich blood supply and portally-drained nature, which facilitates the spread of cancer cells from colorectal tumors to the liver.
**Why Each Wrong Option is Incorrect:**
A. Breast cancer: Breast cancer typically spreads via the lymphatic system and rarely involves the liver.
B. Lung cancer: Lung cancer primarily spreads to the brain, bones, adrenals, and occasionally the liver.
C. Prostate cancer: Prostate cancer primarily spreads to the bones, lymph nodes, and rarely the liver.