Formalin toxicity in hydatid liver disease.

Two cases of formalin toxicity developed within 5 to 10 minutes of the placement of packs soaked in formalin within hepatic hydatid cysts. Hypotension, severe tachycardia, postoperative anuria, tachypnoea, restlessness, unconsciousness and coma developed. There was no response to the treatment given. Treatment was continued for about 12 hours. The problems associated with the use of formalin are discussed.