<prompt> A 10 years old female presented with recurrent attacks of cholangitis. CECT was done, the diagnosis on the basis of CECT is:Type 1 choledochal cystType 3 choledochal cystType 4 choledochal cystType 5 choledochal cyst  <response>: The CECT shows central dot; which is seen in type 5 choledochal cyst Carolis disease Choledochal cyst.- Characterized by dilatation of bile duct. TODANI modification of ALONSO LEJ classification: -- Type I - dilatation of extra hepatic bile duct MC- Type II - diveicular dilatation of extra hepatic bile duct- Type III - dilatation of intraduodenal pa of bile duct choledochocele- Type IV A - dilatation of both intra and extra hepatic bile duct- Type IV B - multiple cyst involving only extra hepatic bile duct - Type V - multiple cyst involving only intra hepatic bile duct Carolis disease 