Kidney tumor - cysts, children, adult benign
Cystic non-neoplastic lesions
Reviewers: Mandolin Ziadie, M.D. (see Reviewers page)
Revised: 30 March 2012, last major update December 2011
Copyright: (c) 2003-2012, PathologyOutlines.com, Inc.
● Occasional finding that increases with age (0.1% in children, 20% at age 50+ years) and may present as a mass lesion
● 65% of renal masses, may be confused with cystic renal cell carcinoma, but avascular with smooth contours
● May calcify
● Hemorrhage may cause acute pain
● Percutaneous aspiration
● Continuous negative-pressure catheter drainage (AJR Am J Roentgenol 2008;190:1193)
● Thin-walled cortical cysts, measuring up to 10 cm, which are filled with clear yellow fluid
Simple cyst of upper pole
Multiple, smooth renal cysts filled with serous fluid
Solitary, smooth kidney cyst (lower pole) filled with serous fluid
Large cortical cysts with dark red blood
● Single layer of cuboidal, flattened or atrophic epithelium
● May have thickened walls with hemosiderin-laden macrophages and atrophic epithelium
End of Kidney tumor - cysts, children, adult benign > Cystic non-neoplastic lesions > Simple cysts
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