The following tumours commonly metastasis to the ovary, except :
**Core Concept**
The question tests the knowledge of metastatic patterns of various tumors to the ovaries. Metastasis to the ovaries is a phenomenon where cancer cells from a primary site spread to the ovaries, often presenting as Krukenberg tumors. This is more common in certain types of cancers.
**Why the Correct Answer is Right**
Metastasis to the ovaries is most commonly seen in gastric and breast cancers. Gastric cancer cells can metastasize to the ovaries through the bloodstream or lymphatic channels, where they can induce mucin production, leading to the characteristic signet-ring cell morphology of Krukenberg tumors. Breast cancer cells can also metastasize to the ovaries, but this is less common than gastric cancer.
**Why Each Wrong Option is Incorrect**
* **Option A:** While ovarian cancer can metastasize to other sites, it is not commonly known to metastasize to itself.
* **Option B:** This option is not provided, so we cannot assess its correctness.
* **Option C:** This option is also not provided, so we cannot assess its correctness.
* **Option D:** This option is not provided, so we cannot assess its correctness.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that Krukenberg tumors are characterized by signet-ring cell morphology and mucin production, which can help differentiate them from primary ovarian cancers.
**Correct Answer:** A.