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Soft Tissue Tumors
Pelvic lipomatosis
Author: Nat Pernick, M.D., PathologyOutlines.com, Inc.
Reviewer: David Lucas, M.D., University of Michigan Health Systems (January 2009)
Revised: 26 June 2009, last major update June 2009
Definition
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● Lipomatosis in region of rectum or bladder
● Not a WHO diagnosis
Epidemiology
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● Rare; usually black males, median age 48 years, range 9-80 years
● Associated with cystitis glandularis, cystitis cystica or cystitis follicularis in 75% of cases
● Also occurs in renal hilum, associated with chronic pyelonephritis, renal lithiasis and kidney atrophy
Case reports
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● With bladder adenocarcinoma (Urol Oncol 2004;22:428)
Gross images
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Kidney shows increase in peripelvic adipose tissue,
hydronephrosis and cortical atrophy
Micro description
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● Normal adipose tissue
Micro images
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Unremarkable adipose tissue Associated cystitis glandularis
Differential Diagnosis
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● Well differentiated liposarcoma - discrete mass, not in pelvis, atypical cells within fibromyxoid stroma
End of Soft Tissue Tumors > Pelvic lipomatosis
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