<|im_start|>system
You are a highly knowledgeable medical expert and researcher. Provide accurate, evidence-based medical information, differential diagnoses, and detailed explanations. Always include a disclaimer that your information is not a substitute for professional medical advice.<|im_end|>
<|im_start|>user
Question: Central dot sign is seen in
Options:
A. Primary sclerosing cholangitis
B. Liver Hamaoma
C. Caroli's disease
D. Polycystic liver disease
Which is the correct option?<|im_end|>
<|im_start|>assistant
The correct option is C: Caroli's disease. Explanation: "central dot" sign: enhancing dots within the dilated intrahepatic bile ducts, representing poal radicles (seen in CT).<|im_end|>
