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Prevalence of lower extremity edema following inguinal lymphadenectomy: A systematic review and meta-analysis
Brett A Hahn1, Milan C Richir2, Arjen J Witkamp2
1Department of Plastic and Reconstructive Surgery University Medical Center Utrecht Utrecht The Netherlands.
Background:
Lower extremity lymphedema (LEL) can develop because of inguinal lymph node dissection in the treatment of gynecologic, genitourinary, and dermatological malignancies. To optimize patient counseling and patient selection for microsurgical interventions aimed at preventing or treating LEL, its prevalence and associated patient characteristics must be accurately documented. This systematic review and meta-analysis provides a comprehensive overview of literature on the reported prevalence of LEL in patients undergoing inguinal lymphadenectomy.
Methods:
From Embase, PubMed, and Web of Science databases, 23 studies were identified that met the inclusion criteria. This review was conducted in accordance with the preferred reporting items for systematic reviews and meta-analyses guidelines. Risk of bias was assessed using the Risk of Bias in Non-randomized Studies-of Exposure tool.
Results:
Random-effects meta-analyses of proportions estimated a 24% (95% confidence interval [CI]: 17-31) pooled prevalence of LEL with a high degree of heterogeneity between the studies (I2 =96%, p < 0.01). Subgroup analysis revealed significant differences in LEL prevalence based on the indications for inguinal lymphadenectomy. The pooled LEL prevalence was 25.75% (95% CI: 0.00-96.16) for patients who underwent lymphadenectomy for melanoma, 12.22% (95% CI: 1.03-23.40) for penile cancer, 30.96% (95% CI: 21.08-40.84) for vulvar cancer, and 13.62% (95% CI: 0.00-51.02) for miscellaneous indications.
Conclusion:
The findings from this study emphasize the importance of considering malignancy etiology when assessing the risk of LEL following inguinal lymphadenectomy. This knowledge could aid physicians in informing patients about the risk of LEL, while also facilitating proper patient selection for microsurgical interventions.
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