Surgical treatment of echinococcal cyst of the heart. Report of two cases and review of the world literature.

The case histories of two children with echinococcal cysts of the left ventricular myocardium are reported. Both patients underwent successful enucleation of the cysts, after initial local treatment with 0.5 percent silver nitrate solution. A previous review of the world literature on the surgical treatment of echinococcal cyst of the heart, published in 1971, is brought up to date by the addition of 60 new cases to the 118 cases then described. Instillation of 0.5 percent silver nitrate solution into the cyst cavity is now a routine procedure in our institution to sterilize the cyst and to kill the scolices. This substance is preferable to formalin and hypertonic sodium chloride solution, because it acts rapidly and is nontoxic and nonabsorbable. The two children in this report are the first in whom silver nitrate solution was used to sterilize the myocardial cysts.