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Medical Definition of Dioctophyma renale
1. A large blood red nematode found in the pelvis of the kidney and the peritoneal cavity of the dog; fairly common in wild carnivores like the mink, but rarely found in man; the life cycle is via leeches ectoparasitic on crayfish, which are then eaten by various fishes and finally by man or any of a number of other mammalian fish-eating hosts. (05 Mar 2000)