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Gender differences in benign renal masses

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Abstract

Purpose

To examine gender-specific differences in benign renal tumors.

Methods

This retrospective study included 135 adult Caucasian patients with 143 benign renal tumors, which were treated surgically at a single institution. Demographics, comorbidity, histology, renal function, and management were compared by gender. A systematic review and meta-analysis of the literature were performed.

Results

A total of 73 women were compared with 62 men. The female-to-male ratio was significantly higher in patients with benign renal tumors than in those with renal cell carcinoma (1.18:1 vs. 0.57:1, p < 0.001). Only 17 % of benign renal tumors were correctly classified by preoperative computed tomography. The most frequently observed histological types were oncocytoma (44 %) and angiomyolipoma (37 %). Angiomyolipoma occurred more than twice as often in women than in men (72 vs. 28 %), while oncocytoma was more frequently found in men (59 vs. 41 %, p = 0.001). Men with benign renal tumors were older (p = 0.002) and had higher body mass indices (p = 0.019), higher comorbidity indices (p < 0.001), lower ECOG performance status (p < 0.001), and smaller tumors (p = 0.045). No differences were seen in pack years, mode of diagnosis, bilaterality, renal function, use of laparoscopic surgery, and the rate of radical nephrectomy. In the meta-analysis of 9,665 renal tumors, women had a 2.55-fold increased chance of benign pathology and a greater chance of angiomyolipoma (OR 4.66) than men.

Conclusions

This study demonstrated several gender-specific differences in benign renal tumors, especially in the histological types. Despite this, clinical–pathological features and management of benign renal tumors in men and women appear more alike than different.

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Author information

Authors and Affiliations

  1. Department of Urology, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria

    Julian Mauermann, Michela de Martino, Matthias Waldert, Hans Christoph Klingler & Tobias Klatte

  2. Department of Clinical Pathology, Medical University of Vienna, Vienna, Austria

    Andrea Haitel

  3. Department of Urology, LKH Korneuburg, Korneuburg, Austria

    Mesut Remzi

Authors
  1. Julian Mauermann
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  2. Michela de Martino
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  3. Matthias Waldert
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  4. Andrea Haitel
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  5. Hans Christoph Klingler
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  6. Mesut Remzi
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  7. Tobias Klatte
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Corresponding author

Correspondence to Tobias Klatte.

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Mauermann, J., de Martino, M., Waldert, M. et al. Gender differences in benign renal masses. World J Urol 31, 1051–1057 (2013). https://doi.org/10.1007/s00345-013-1032-4

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  • DOI: https://doi.org/10.1007/s00345-013-1032-4

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