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Journal Article
Meta-Analysis
Review
Incidence of lower limb lymphedema after vulvar cancer: A systematic review and meta-analysis.
Medicine (Baltimore) 2017 November
BACKGROUND: Lower limb lymphedema (LLL) is an important concern for patients with vulvar cancer. Studies of the incidence of vulvar cancer-related lymphedema and its risk factors have substantially increased in the new millennium.
OBJECTIVES: This article is a meta-analysis that aimed to systematically evaluate the incidence of LLL and its risk factors related to vulvar cancer.
DATA SOURCES: Data were collected from eligible studies from PubMed, ScienceDirect, and Web of Science.
SYNTHESIS METHODS: Random effects models were used to calculate a pooled overall estimate of LLL incidence, and subgroup analyses were performed to assess the effects of different study designs, countries of study origin, diagnostic methods, and extent of lymph node surgery. Risk factors for lymphedema were also evaluated.
RESULTS: Twenty-seven studies met the inclusion criteria for the assessment of lymphedema incidence with a pooled estimate of 28.8% [95% confidence interval (CI) 22.1-35.5]. The estimate was 16.7% (95% CI 9.7-23.7) when data were restricted to prospective cohort studies (7 studies). The incidence of LLL was increased by approximately 5-fold in women who underwent inguinofemoral lymph node dissection compared to those who underwent sentinel lymph node biopsy. The reported risk factors included wound infection, inguinofemoral lymphadenectomy, older age, body mass index (BMI), and radiation therapy.
CONCLUSIONS: Approximately 3 in 10 women who survive vulvar cancer will develop lower limb lymphedema. More studies are needed to improve the understanding of its risk factors and to develop prevention and management strategies to alleviate this distressing disorder.
OBJECTIVES: This article is a meta-analysis that aimed to systematically evaluate the incidence of LLL and its risk factors related to vulvar cancer.
DATA SOURCES: Data were collected from eligible studies from PubMed, ScienceDirect, and Web of Science.
SYNTHESIS METHODS: Random effects models were used to calculate a pooled overall estimate of LLL incidence, and subgroup analyses were performed to assess the effects of different study designs, countries of study origin, diagnostic methods, and extent of lymph node surgery. Risk factors for lymphedema were also evaluated.
RESULTS: Twenty-seven studies met the inclusion criteria for the assessment of lymphedema incidence with a pooled estimate of 28.8% [95% confidence interval (CI) 22.1-35.5]. The estimate was 16.7% (95% CI 9.7-23.7) when data were restricted to prospective cohort studies (7 studies). The incidence of LLL was increased by approximately 5-fold in women who underwent inguinofemoral lymph node dissection compared to those who underwent sentinel lymph node biopsy. The reported risk factors included wound infection, inguinofemoral lymphadenectomy, older age, body mass index (BMI), and radiation therapy.
CONCLUSIONS: Approximately 3 in 10 women who survive vulvar cancer will develop lower limb lymphedema. More studies are needed to improve the understanding of its risk factors and to develop prevention and management strategies to alleviate this distressing disorder.
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