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Hormone receptor expression in renal angiomyolipoma: clinicopathologic correlation. Urology 2008 Oct;72(4):927-32

Date

04/01/2008

Pubmed ID

18374399

Pubmed Central ID

PMC2789392

DOI

10.1016/j.urology.2008.01.067

Scopus ID

2-s2.0-52949129082   44 Citations

Abstract

OBJECTIVES: Although renal angiomyolipoma (AML) occurs more commonly in females than males, the origin of this difference in incidence by sex is unknown. Therefore, we investigated the expression of the androgen receptor (AR), estrogen receptor subtypes alpha (ERalpha) and beta (ERbeta), progesterone receptor, and the enzyme aromatase in renal AML.

METHODS: We evaluated specimens from 110 patients who had undergone resection of a renal AML, including 90 women and 20 men. Immunohistochemistry was performed using monoclonal antibodies on paraffin-embedded tissue sections. Expression was correlated with patient demographics and tumor pathologic features.

RESULTS: ERbeta was expressed in 100% (106 of 106) of the AML specimens evaluated. Of the 104 specimens that could be assessed for the AR, 82 (79%) demonstrated staining. Of 110 lesions, 31 (28%), 42 (38%), and 11 (10%) expressed ERalpha, progesterone receptor, and aromatase, respectively. The level of ERbeta expression was not associated with patient age (P = 0.92), sex (P = 0.82), a diagnosis of tuberous sclerosis (P = 0.56), or histologic subtype of AML (P = 0.94). A trend was found toward increased AR expression in men (P = 0.069) and younger patients (P = 0.052), and ERalpha was expressed in the AML specimens from 5 (71%) of 7 patients with tuberous sclerosis compared with 26 (25%) of 103 without tuberous sclerosis (P = 0.018). Both AR and ERalpha expression were more common in the triphasic subtype of AML than in the lipomatous tumors (P = 0.046 for both).

CONCLUSIONS: The results of our study have shown that ERbeta expression is ubiquitous in renal AML, and the AR is found in most tumors. ERalpha and progesterone receptor were expressed in approximately one third of cases. These data suggest a potential role for hormones in the pathogenesis and management of renal AML.

Author List

Boorjian SA, Sheinin Y, Crispen PL, Lohse CM, Kwon ED, Leibovich BC

Author

Yuri M. Sheinin MD, PhD Assistant Professor in the Pathology department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Adult
Aged
Aged, 80 and over
Angiomyolipoma
Aromatase
Female
Humans
Kidney Neoplasms
Male
Middle Aged
Receptors, Androgen
Receptors, Estrogen
Receptors, Progesterone