Central dot sign is seen in:
Caroli's disease
Primary sclerosing cholangitis
Polycystic liver disease
Liver hamaoma
A. i.e. Caroli's 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. Caroli's disease Communicating cavernous ectasia of the intrahepatic bile ducts. (IHBD). - AR congenital disorder - Segmental, saccular dilatation of the IHBD. - A/W: - Choledochal cyst and - AR polycystic kidney disease (ARPKD) Signs Disease Central dot signQ Caroli's 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