Central dot sign on CT SCAN -
Ans. is 'a' i.e., Caroli's disease o Central Dot sign on CT or USG is seen in (i) Caroli's disease (most common cause); (ii) Prebiliary cysts; (iii) Obstructive jaundice; and (iv) Periportal lymphedema.
Caroli's disease
Primary sclerosing cholangitis
Polycystic liver disease
Liver hamartoma
Abdominal Radiography