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Formalin-induced experimental sclerosing cholangitis in the rat
K Kotzampassi1, E Eleftheriadis, V Tzioufa
1Department of Surgery, Aristotelian University of Thessaloniki, Greece.
Histology and Histopathology
|April 1, 1989
Summary
Formalin used to sterilize echinococcus cyst cavities can cause sclerosing cholangitis. This study in rats demonstrated that formalin induces cholestasis and liver damage, recommending its avoidance in hydatid disease surgery.
Area of Science:
- Hepatology
- Surgical Pathology
- Parasitology
Background:
- Sclerosing cholangitis is a rare complication after echinococcus cyst removal.
- Formalin irrigation of residual cavities is suspected to cause this complication due to its chemical properties.
Purpose of the Study:
- To investigate the hypothesis that formalin causes sclerosing cholangitis.
- To evaluate the pathological changes induced by formalin in rat liver tissue.
Main Methods:
- Laparotomy and injection of 2% buffered formalin into the central hepatic lobe of five rats.
- Repeated laparotomy and liver biopsy at 6, 12, 18, and 24 weeks post-injection.
- Microscopic evaluation of hepatic parenchyma for pathological changes.
Main Results:
- Formalin injection led to dilated portal tracts and bile canaliculi.
- Thickening of pericanalicular cytoplasm, portal/periportal inflammation, and fibrosis were observed.
- Enlargement of the space of Disse indicated cholestasis and liver damage.
Conclusions:
- 2% buffered formalin solution induces key phenomena of cholestasis and sclerosing cholangitis in rats.
- Formalin should be avoided in surgical procedures for liver hydatid disease to prevent adverse hepatic outcomes.