Sexual Health
How high is the incidence rate of vulvar cancer? There are four ways to avoid the disease
The emergence of vulvar cancer makes many patients particularly painful, and it is also a serious malignant tumor. Usually, we should clarify its causes and actively and reasonably prevent it.
How high is the incidence rate of vulvar cancer
Vulvar cancer is a malignant tumor of the vulva, which is not very rare. It mostly occurs in middle-aged and elderly women. The common site of the disease is the labia major, followed by the labia minor, vaginal vestibule and penis. Its main symptoms are local nodules of vulva, accompanied by pain and itching. Many patients first have long-term vulvar pruritus, and after many years, papules, nodules or small ulcers appear locally, which cannot be cured for a long time. Some patients are accompanied by vulvar leukoplakia.
Primary vulvar malignant tumors are relatively rare, accounting for 1.6% of female malignant tumors and 3% - 5% of female reproductive tract malignant tumors. The disease mostly occurs in elderly women over 50 years old, with an average age of 65-70 years in foreign countries and 50-60 years in China. Iversen concluded that the incidence rate of vulvar cancer in Norway has not increased in all age groups in the past 40 years, while the incidence of vulvar intraepidermal tumors has increased three times. Iversen concluded that the incidence rate of vulvar cancer in Norway has not increased in all age groups in the past 40 years, while the incidence of vulvar intraepidermal tumors has increased three times.
Causes of vulvar cancer
1. Vulvar leukoplakia: This disease is closely related to the incidence of vulvar cancer. According to statistics, vulvar leukoplakia was about 30~50% before the onset of the disease. The recognition and diagnostic criteria of vulvar leukoplakia are not uniform and should not be compared and analyzed. At present, there are different views on this issue. The relatively consistent view is that the white skin and mucous membrane of vulva are collectively referred to as white spots and white lesions, which cannot be named according to clinical and microscopic features. Vulvar leukoplakia is only applicable to the atypical hyperplasia of vulvar epithelium (N0vak 1974), and its histological characteristics should have different degrees of cellular heterogeneity (Lever, 1975). Zhang Baohe believed that vulvar leukoplakia should be classified according to the typical proliferation and cancer of the lesion (1977). In 1940, Tausing believed that 50% of vulvar leukoplakia would become cancerous, and 70% of squamous cell carcinoma patients had leukoplakia.
2. Chronic inflammatory stimulation of vulva: chronic inflammatory stimulation of vulva may be the inducing factor. According to the epidemiological statistics, JagazeH et al. found that 64% of obese people and 24% of diabetes patients were obese. Obesity and diabetes patients are often accompanied by acute and chronic inflammation of the vulva, which promotes precancerous lesions.
3. Viral etiology: In the study of the etiology of Bowen's disease, viral particles were found from the electron microscope (Bhawen, 1980). The case of verrucous protrusion is probably caused by virus (Japaze H, 1977). In addition, 15% (Framklin 1972) - 34% (Merril, 1970) vulvar cancer is associated with cervical cancer (in situ or invasive cancer), and herpesvirus type II is associated with cervical cancer. Chronic lymphogranuloma caused by virus is one of the most common granulomas.