Kidney nontumor
Infections / parasites
Dioctophyma renale

Author: Nikhil Sangle, M.D. (see Authors page)

Revised: 21 March 2018, last major update September 2012

Copyright: (c) 2003-2018,, Inc.

PubMed Search: Dioctophyma renale [title]

Cite this page: Sangle, N. Dioctophyma renale. website. Accessed October 23rd, 2018.
Definition / general
  • Also called giant kidney worm
  • Found in dogs, minks, cats and other fish eating mammals
  • Adult worms live in renal pelvis; their eggs incite a granulomatous response
  • Adult worms progressively destroy renal parenchyma until only kidney and worm remain
Case reports
Gross description
  • Hemorrhagic cyst, often thick walled
Microscopic (histologic) description
  • Cyst wall composed of granulomatous tissue with eggs and cross striations of parasites
  • Eggs have birefringent striated double wall
Differential diagnosis