Mucocele and hydrops of the gallbladder develops as
a result of impacted stone in
the gallbladder neck or cystic duct.
1) Diagram of
Hydrops showing distended thin walled gallbladder containing clear
2) Diagram of
mucocele containing mucus.
Hydrops of gallbladder is
characterized by large distended gallbladder. The wall is thin and the
lumen contains clear fluid.
In mucocele the contained
bile is absorbed and replaced by mucus secreted by the gallbladder. The organ is
thin-walled and translucent and may contain a pint of mucus.
Hydrops is often
associated with various infectious diseases Example: Kawasaki disease.
Other causes leading to
hydrops and mucocele are resolved acute cholecystitis, polyps or malignancy of the
gallbladder, compression of the neck or cystic duct by lymph nodes or
inflammatory fibrosis, congenital narrowing of the cystic duct, parasites such as Ascaris.
Mucocele may also occur
in liver transplant patients.
i) The mucosa is usually
ii) Mild chronic
inflammatory infiltrate in the wall
iii) Areas of fibrosis of
the muscularis in longstanding cases.