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Kidney tumor

Other adult malignancies


Reviewers: Sean Williamson, M.D. (see Reviewers page)
Revised: 13 July 2012, last major update July 2012
Copyright: (c) 2003-2012, PathologyOutlines.com, Inc.


● Rare, may be extension of retroperitoneal teratoma or Wilms’ tumor with teratoid features (Radiographics 2005;25:481)

Case reports

● Newborn with immature teratoma in horseshoe kidney (J Pediatr Surg 2006;41:1313)
● 1 month old infant with renal teratoma recapitulating cecum and appendix with bone, neuroepithelium, fat, fibromuscular tissue, cartilage, and skin (J Pediatr Surg 2010;45:255)
● 30 year old woman with primary carcinoid tumor arising in mature teratoma of kidney (Arch Pathol Lab Med 2002;126:979), review of 7 similar cases (Diagn Pathol 2007;2:15)

Radiologic images

CT scan

Gross images

Various images

Micro images

Primary carcinoid tumors arising within mature teratoma

Adipose tissue, pilosebaceous elements and keratinizing squamous epithelium

Differential diagnosis

● Cystic renal dysplasia: disorganized lobar organization, undifferentiated mesenchyme, metaplastic cartilage, immature collecting ducts, cysts, very rarely squamous cysts (Pediatr Nephrol 2011;26:1893)

End of Kidney tumor - adult malignancies > Other adult malignancies > Teratoma

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