Kidney tumor - cysts, children, adult benign
Benign (usually) adult tumors
Reviewers: Mandolin Ziadie, M.D. (see Reviewers page)
Revised: 15 August 2013, last major update February 2012
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● Adipose and hematopoietic tumor usually diagnosed in adrenal gland
● < 50 cases outside of adrenal gland with < 25 cases in kidney
● May coexist with other tumors: papillary urothelial carcinoma (Int J Surg Pathol 2010;18:437)
● 65 year old man with hilar tumor (Arch Pathol Lab Med 2006;130:1049)
● 66 year old man with renal sinus tumor (Arch Pathol Lab Med 1999;123:631)
● 66 year old man with perirenal tumor (Arch Pathol Lab Med 1994;118:188)
Well-delineated lesion (arrow) infiltrating into hilum
73 year old man with pelvic tumor
● Mixture of adipose tissue and normal hematopoietic cells
● No bony spicules
● Not connected to medullary cavity of any bone by definition
Fat cells and hematopoietic cells
Myelolipoma separated from renal parenchyma by fibrous band (arrow)
End of Kidney tumor - cysts, children, adult benign > Benign (usually) adult tumors > Myelolipoma
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