<prompt> Central dot sign is seen in:Carolis diseasePrimary sclerosing cholangitisPolycystic liver diseaseLiver hamaoma  <response>: A. i.e. Carolis disease Central dot sign is considered pathognomonic of carolis diseaseQ. This sign consists of cystically dilated intra hepatic biliary radicles with a dot of increased density represented by poal radicle with the lumen of duct. Carolis disease Communicating cavernous ectasia of the intrahepatic bile ducts. IHBD. - AR congenital disorder - Segmental, saccular dilatation of the IHBD. - AW: - Choledochal cyst and - AR polycystic kidney disease ARPKD Signs Disease Central dot signQ Carolis disease Pruned- Tree appearance Beaded appearenceQ Skip lesions Primary sclerosing cholangitis Light bulb appearance Liver Hemangioma on T2W MRI Water lily sign HoneycombingQ Liver hydatid 