Extrahepatic right hepatic duct diverticulum: a rare entity.
BACKGROUND
Douglas described choledochal cysts in 1852 and Todani proposed an anatomy-based classification in 1977. The classification is the most extensively used, but does not include some rare variations. We present a case of hepatic duct diverticulum, one of the variations, and discuss its diagnosis and treatment.


METHODS
A 57-year-old woman presented with upper abdominal pain and discomfort associated with nausea and vomiting. She was finally diagnosed with cholelithiasis and right hepatic duct diverticulum.


RESULTS
The patient underwent resection of the hepatic duct diverticulum and cholecystectomy, and was asymptomatic 26 months after surgery.


CONCLUSIONS
Hepatic duct diverticulum is a rare form of choledochal cyst, not included in Todani's classification. Todani's classification including this and other uncommon variations of choledochal cysts must be reviewed. The best diagnostic imaging methods and treatment for choledochal cysts must be defined.
Fernandes
Eduardo S M
ES
Department of General Surgery, Section of Hepatobiliary Surgery and Transplantation, Rio de Janeiro Federal University, Rio de Janeiro, Brazil.
Bernardo
Raquel L
RL
Fernandes
Moacir M
MM
Araújo
Rogério M C
RM
Sebbe
Renato
R
Monte
Asterio
A
Coelho
José F
JF
Souza
Antonio A P
AA
Ribeiro Filho
Joaquim
J
D001649:Bile Duct Diseases / Q000175:diagnosis* / Q000628:therapy; D004240:Diverticulum / Q000175:diagnosis* / Q000628:therapy; D005260:Female; D006500:Hepatic Duct, Common; D006801:Humans; D008875:Middle Aged