Kidney nontumor
Infections / parasites
Actinomycosis

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

Revised: 6 February 2018, last major update January 2013

Copyright: (c) 2002-2018, PathologyOutlines.com, Inc.

PubMed Search: Actinomycosis [title] kidney pathology

Cite this page: Sangle, N. Actinomycosis. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/kidneyactinomycosis.html. Accessed February 19th, 2018.
Definition / general
  • Actinomyces are anaerobic, gram positive, non acid fast filamentous bacteria that are normal flora in mouth, vagina, GI tract
  • Cause chronic suppurative and granulomatous disease of cervicofacial, thoracic or abdominal region
  • Sometimes called the most "misdiagnosed disease" because abscesses can mimic malignancy and may lead to unnecessary surgical resections (South Med J 2004;97:316, Am J Surg Pathol 2000;66:85)
  • Actinomyces israelii: usual cause of Actinomyces abscesses; also most common cause of disseminated actinomycosis, secondary to GI perforation (diverticulitis, appendicitis) or procedures, IUD, aspiration, poor oral hygiene / dental procedures
Case reports
Treatment
  • Antibiotics; possibly nephrectomy
Gross images

Images hosted on other servers:
Missing Image

Actinomycosis of kidney

Microscopic (histologic) description
  • Marked acute and chronic inflammation with occasional "sulfur granules"
Microscopic (histologic) images

Images hosted on PathOut server:
Missing Image Missing Image

11 year old girl



Images hosted on other servers:
Missing Image Missing Image Missing Image

Retroperitoneal mass