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| Vulvar cancer ： ウィキペディア英語版 |
Vulvar cancer
Vulvar cancer is a malignant, invasive growth in the vulva, or the outer portion of the female genitals. The disease accounts for only 0.6% of cancer diagnoses〔(【引用サイトリンク】url=http://www.cancer.org/cancer/vulvarcancer/detailedguide/vulvar-cancer-key-statistics )〕 but 5% of gynecologic cancers in the United States.〔(【引用サイトリンク】publisher=National Cancer Institute )〕 The labia majora are the most common site involved representing about 50% of all cases, followed by the labia minora.〔
(【引用サイトリンク】publisher=National Cancer Institute )
〕 The clitoris and Bartholin glands may rarely be involved.〔
(【引用サイトリンク】publisher=cancer.org )
〕
Vulvar cancer is separate from vulvar intraepithelial neoplasia (VIN), a superficial lesion of the epithelium that has not invaded the basement membrane—or a pre-cancer.〔(【引用サイトリンク】url=https://www.sgo.org/patients-caregivers-survivors/caregivers/vulvar-cancer-general-information/ )〕 VIN may progress to carcinoma-in-situ and, eventually, squamous cell cancer.
According to the American Cancer Society, in 2014, there were about 4, 850 new cases of vulvar cancer and 1, 030 deaths from the disease.〔(【引用サイトリンク】url=http://www.cancer.org/acs/groups/content/@research/documents/webcontent/acspc-042151.pdf )〕 In the United States, five-year survival rates for vulvar cancer are around 70%.〔(【引用サイトリンク】url=http://seer.cancer.gov/statfacts/html/vulva.html )〕
== Types ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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