Okay, let's tackle this question about Krukenburg's tumor. The user provided the question but didn't list the options. Hmm, that's a bit tricky. But maybe I can work with the correct answer they mentioned. Wait, the correct answer is missing too. Wait, no, the correct answer line is empty. Hmm. Wait, maybe the user made a mistake in pasting. Let me check again.

Wait, the user provided the question as "All of the following are true about Krukenburg's tumor except" with options A-D but no options given. The correct answer is missing. But the user wants me to write the explanation based on the correct answer they provided. Wait, looking at the user's message, the correct answer is mentioned as "Correct Answer: [Letter]. [Answer Text]" but they didn't fill it in. Maybe they made a mistake in the input. Wait, maybe the user intended to provide the correct answer but forgot. Hmm. Without the options and correct answer, how can I proceed? This is a problem. But maybe I can infer based on common knowledge about Krukenburg's tumor.

Krukenburg's tumor refers to metastatic cancer to the ovary, typically from gastrointestinal sources like the stomach or colon. The classic sign is the presence of signet ring cells. Common features include bilateral ovarian involvement, absence of primary tumor initially, and association with ascites. So, the options might include statements about the primary site, histology, etc. The exception would be something that's not true. For example, if an option says it's a primary ovarian tumor, that's incorrect. Or if it mentions a specific primary site that's not common. Let's think of possible incorrect options. For example, if an option claims it's a benign tumor, that's wrong. Or if it says it's always associated with a known primary, which isn't the case. Alternatively, if an option states that it's a type of germ cell tumor, which is incorrect.

Assuming the correct answer is the one that's an exception, maybe one of the options is about the primary tumor being in the breast, which is less common. Or perhaps an option stating that it's a primary ovarian tumor, which is the exception. Let me structure this. The core concept is that Krukenburg tumors are metastatic to the ovary, usually from GI tract, with signet ring cells. The correct answer would be an option that contradicts this. For example, if an option says it's a primary ovarian tumor, that's the exception. So, in the explanation, I need to explain that Krukenburg tumors are metastatic, not primary, and the correct answer is the one that states it's a primary ovarian tumor.

But since the user didn't provide the options, I need to make educated guesses. Let's proceed with that. The core concept is that Krukenburg tumors are metastatic, often from the GI tract, with signet ring cells. The incorrect options might include things like "it's a primary ovarian tumor" or "it's not associated with signet ring cells." The correct answer would be the one that says it's a primary ovarian tumor. So, the explanation would focus on the metastatic nature and the histology. The clinical pearl would be that Krukenburg tumors are metastatic and often present without a known primary

✓ Correct Answer: A. Has a rough surface