Cervical cancer remains a significant health concern in Hong Kong, yet it stands alone as the only female cancer that can be prevented through vaccination. In 2019, it was the eighth most common cancer among women in the city, accounting for three percent of all new female cancer cases. Understanding its symptoms, causes, and prevention methods could save lives.
A Silent Threat That Can Lurk for a Decade
Cervical cancer develops when high-risk strains of the human papillomavirus (HPV) infect cervical cells, triggering malignant changes over time. Unlike many cancers, this one has a uniquely long latency period—the virus can remain dormant inside the body for up to ten years without producing any noticeable symptoms.
Dr. Chan Mei-ling, a Hong Kong-based oncologist, explains that this silent progression makes regular screening essential. “Many women assume that without symptoms, they are healthy. But cervical cancer often gives no warning until it reaches advanced stages,” she says.
The disease is caused by sexually transmitted HPV strains. Low-risk HPV types typically cause genital warts—sometimes resembling cauliflower-like growths on the skin—while high-risk strains like HPV 16 and 18 are responsible for most cervical cancer cases.
Who Is Most at Risk?
Certain groups face elevated risk. Women who have multiple sexual partners, began sexual activity early, or have a history of sexually transmitted infections are more susceptible. Others include those with weakened immune systems—such as individuals with chronic kidney disease, HIV, or autoimmune disorders—as well as smokers and women from lower socioeconomic backgrounds.
The stories of Taiwanese celebrities Tseng Chih-hsi and Lin Zhen-yi illustrate that cervical cancer does not discriminate by age. Tseng, diagnosed with stage three cervical precancerous lesions at 33, had initially experienced irregular menstruation and a three-centimeter cyst that grew to six centimeters over four years. Lin, diagnosed with cervical carcinoma in situ at 30, underwent successful surgery. Both cases serve as stark reminders that young women are not immune.
Recognizing the Warning Signs
Early-stage cervical cancer often produces no symptoms at all. When signs do appear, they may include:
- Abnormal or irregular vaginal bleeding
- Bleeding between menstrual periods or after sexual intercourse
- Postmenopausal bleeding or discharge tinged with blood
Advanced-stage symptoms are more pronounced and include:
- Persistent back pain
- Swelling in the legs
- Difficulty urinating or passing stool
- Enlarged lymph nodes in the groin or neck
- Abnormal fistulas forming between the vagina and rectum
Survival Rates Depend on Early Detection
The prognosis for cervical cancer varies dramatically by stage. Patients diagnosed at stage one have a five-year survival rate as high as 85 percent. This drops to 70 percent at stage two, 35 percent at stage three, and falls below 20 percent at stage four. Alarmingly, approximately 30 percent of treated patients experience recurrence within two years, underscoring the need for diligent follow-up care.
Prevention Through Diet and Lifestyle
Traditional Chinese medicine practitioners recommend a “dampness-reducing tea” containing ingredients like plantain seed (che qian zi) for diuresis, white atractylodes (bai zhu) to strengthen the spleen, Chinese yam (huai shan yao) for lung and kidney support, and cnidium fruit (she chuang zi) for its antiseptic and warming properties. However, experts advise consulting a licensed TCM practitioner before using such remedies.
Nutritionist Wong Jiao-hui emphasizes the role of phytochemicals in cancer prevention. These plant-based compounds—including naringenin found in citrus fruits, beta-carotene in red and yellow vegetables, isoflavones in soy products, and diosgenin in yams—offer antioxidant protection that may help combat precancerous changes. Foods rich in zinc and selenium, such as seafood, shellfish, nuts, and whole grains, also support healthy cell division and reduce the risk of cellular mutations.
Screening Saves Lives
The Department of Health recommends that sexually active women undergo regular cervical screening. Two primary methods exist:
- HPV DNA testing combined with cervical cytology: Suitable for women aged 30 and older, this dual approach detects both high-risk HPV and abnormal cell changes in a single sample, improving screening accuracy.
- Pap smear: Recommended annually for women aged 25 to 64, and for those aged 21 to 24 with elevated risk. After two consecutive normal results, screening can be spaced to every two to three years.
Vaccination: The Game-Changer
HPV vaccination remains the most powerful preventive tool. Since the 2019/20 academic year, Hong Kong’s Childhood Immunisation Programme has offered free HPV vaccines to eligible primary school girls. Three vaccines are registered in Hong Kong:
- Bivalent vaccine: Protects against HPV types 16 and 18
- Quadrivalent vaccine: Covers types 6, 11, 16, and 18
- Nonavalent vaccine: Protects against nine types, including 31, 33, 45, 52, and 58
Importantly, vaccination is not just for women. Men can also receive the vaccine to prevent genital warts and anal cancer.
A Call to Action
Despite these advances, misconceptions persist. The HPV vaccine does not replace routine Pap smears, nor does it protect against all cancer-causing HPV strains. Women aged nine and older are eligible for vaccination, but screening remains essential for sexually active individuals.
As Hong Kong continues to combat cervical cancer, the message is clear: awareness, vaccination, and regular screening form the three pillars of prevention. With a disease that can remain hidden for a decade, proactive health measures are not optional—they are life-saving.
For more information, consult your family doctor or visit the Hong Kong Cancer Fund and Hong Kong Anti-Cancer Society websites for resources and screening guidelines.