[Observations on the ultrastructure of pulmonary hydatid cyst from three cases with Echinococcus granulosus infection].
D000818:Animals; D004445:Echinococcosis, Pulmonary / Q000469:parasitology*; D004446:Echinococcus / Q000648:ultrastructure*; D006801:Humans; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning