Can Cancer Be Contagious? Hepatocellular, Cervical, and Stomach Cancer

Can cancer be transmitted?

Hello, I saw a message online stating that liver cancer, cervical cancer, and stomach cancer are contagious.
Is this true?

Kunrao Zhe, 40~49 year old female. Ask Date: 2012/12/21

Dr. Chen Sirong reply Oncology

1.
Cancer itself is not contagious.

2.
Most patients with liver cancer have either hepatitis B or hepatitis C, which can be transmitted through blood and sexual contact.
If you have received the hepatitis B vaccine, you do not need to worry; however, there is no vaccine for hepatitis C.

3.
Most patients with cervical cancer have HPV (human papillomavirus), which is transmitted through sexual contact.
If the patient is female, she is likely to have contracted it from her male partner, and she cannot transmit it to other females unless they are in a same-sex relationship.

4.
Patients with stomach cancer typically have Helicobacter pylori infections, and those with gastric ulcers usually also have Helicobacter pylori infections.
Of course, diet can contribute to transmission.

5.
It takes several decades after infection for cancer to develop.

6.
Avoiding contact with the blood of liver cancer patients and practicing safe sex will prevent transmission.

7.
Patients with cervical cancer are not the source of transmission for cervical cancer; rather, it is the male partner who transmits HPV.

8.
Regarding the prevention of Helicobacter pylori related to stomach cancer, past experiences and research both domestically and internationally suggest that eating clean and light foods, as well as avoiding overly acidic and sweet foods, can effectively reduce the risk of infection.
Currently, it is known that Helicobacter pylori can transform into a spherical form in water after one day, surviving in water for over a week, so it is crucial to pay attention to the source and cleanliness of water, as well as the cleanliness of water containers.
Additionally, the cleanliness of chopsticks should be noted, especially wooden chopsticks, as Helicobacter pylori can reside on them if they are moist.
Furthermore, lipsticks and saliva may also serve as potential transmission mediums and should be monitored.
Currently, scientists have differing opinions on how Helicobacter pylori adheres to gastric epithelial cells, triggering a series of immune responses that ultimately lead to various diseases.
Where does Helicobacter pylori originate? Does ethnicity affect the likelihood of infection? Is Helicobacter pylori an invasive bacterium? Is infection with Helicobacter pylori an immune-related disease? Do host factors determine the evolution of the disease, or do differences in strain genotypes dictate everything? Are there methods to prevent Helicobacter pylori infection? Even though Helicobacter pylori has been discovered for over 20 years, we have yet to fully unveil the mysteries of this spiral bacterium.
Thank you.

Reply Date: 2012/12/21

More Info

Cancer itself is not contagious in the way that infectious diseases are. You cannot catch cancer from someone else through casual contact, sharing food, or being in close proximity. However, certain viruses and infections that can lead to cancer can be transmitted from person to person. Understanding this distinction is crucial when discussing specific types of cancer, such as hepatocellular carcinoma (liver cancer), cervical cancer, and stomach cancer.

1. Hepatocellular Carcinoma (Liver Cancer): The primary risk factors for liver cancer include chronic infection with hepatitis B virus (HBV) or hepatitis C virus (HCV). These viruses can be transmitted through blood, sexual contact, and from mother to child during childbirth. Therefore, while liver cancer itself is not contagious, the viruses that can lead to liver cancer are. Vaccination against hepatitis B can significantly reduce the risk of developing liver cancer associated with this virus.

2. Cervical Cancer: This type of cancer is primarily caused by persistent infection with certain strains of human papillomavirus (HPV). HPV is a sexually transmitted virus, and while the virus can be transmitted from one person to another, cervical cancer itself cannot be transmitted. Vaccination against HPV is highly effective in preventing the types of HPV that most commonly cause cervical cancer, and it is recommended for preteens and young adults.

3. Stomach Cancer: The link between stomach cancer and infectious agents is primarily associated with Helicobacter pylori (H. pylori) infection. H. pylori is a type of bacteria that can infect the stomach lining and is a known risk factor for developing stomach cancer. H. pylori can be transmitted through contaminated food and water, or through direct contact with saliva, vomit, or fecal matter. While the infection can lead to cancer, the cancer itself is not contagious.

In summary, while certain infections that can lead to cancer are transmissible, the cancers themselves are not. It is essential to focus on prevention strategies, such as vaccination and safe practices, to reduce the risk of these infections and, consequently, the risk of developing associated cancers. Regular screenings and check-ups are also vital for early detection and management of any potential health issues.
Understanding the mechanisms behind these cancers and their associated infectious agents can help in educating the public about cancer risks and prevention strategies. It is important to consult healthcare professionals for personalized advice and information regarding cancer risks and prevention.

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