Kidney nontumor
Fungal / rickettsial / parasitic
Dioctophyma renale

Topic Completed: 3 September 2012

Minor changes: 30 June 2020

Copyright: 2002-2019,, Inc.

PubMed Search: Dioctophyma renale [title]

Nikhil Sangle, M.D.
Page views in 2019: 139
Page views in 2020 to date: 113
Cite this page: Sangle N. Dioctophyma renale. website. Accessed August 14th, 2020.
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
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