Kidney tumor - cysts, children, adult benign
Benign (usually) adult tumors
Reviewers: Mandolin Ziadie, M.D. (see Reviewers page)
Revised: 10 December 2014, last major update January 2012
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● Extremely rare; usually incidental
● Most commonly diagnosed in middle-age women
● 42 year old woman with huge retroperitoneal mass (Br J Radiol 2006;79:e148)
● 71 year old man (Kaohsiung J Med Sci 2005;21:383)
Tumor appears to arise in hilar adipose tissue
● Well circumscribed tumor of benign adipocytes
Cortical tumor projects beneath the renal capsule
● Angiomyolipoma: usually vascular and smooth muscle components; positive for melanocytic markers
● Pelvic lipomatosis: associated with renal atrophy and hydronephrosis but not primarily a kidney lesion
● Atypical lipomatous tumor of retroperitoneum: large tumor with hyperchromatic atypical nuclei
End of Kidney tumor - cysts, children, adult benign > Benign (usually) adult tumors > Lipoma
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