5 Types of Can.cer Known as “Couple’s Diseases”: Doctors Warn That If One Partner Is Diagnosed, the Other Should Get Checked Immediately

In everyday language, terms like “perfect couple” often describe a strong and lasting bond. However, in medicine, there is a concerning concept known as “couple’s cancer.”

This refers to situations where both spouses develop the same type of cancer—or different cancers—within a similar period of time. The cause is not direct transmission, but rather shared lifestyles, eating habits, and living environments over many years.

A real-life case

A couple in Henan, China, serves as a clear example.

The husband went to the hospital due to difficulty swallowing and was diagnosed with esophageal cancer. Although his wife had no obvious symptoms, she decided to get checked as well—and was found to have early-stage esophageal cancer.

Doctors identified the cause as long-term shared habits, including eating very hot foods, consuming too little vegetables, and a preference for salty meals—habits they had maintained for nearly 50 years.

1. Lung cancer

This is one of the most common cancers affecting couples because they share the same living space.

If one partner smokes, the other is exposed to secondhand smoke, which carries similar risks. In addition, both may be exposed to cooking fumes or chemicals from home renovations, increasing the likelihood of lung damage.

Low-dose CT scans are recommended for early detection.

2. Colorectal cancer

Shared dietary habits are a major contributing factor.

Family meals that are high in fat, low in fiber, and include pickled or processed foods containing nitrosamines can damage the digestive system over time for both partners.

Doctors recommend annual fecal occult blood tests and colonoscopy every 5–10 years to detect early abnormalities.

3. Liver cancer

The “couple” connection in liver cancer is often linked to hepatitis B or C viruses.

If one partner is infected, the virus can spread through close contact or sexual activity, increasing the risk for the other partner. Additionally, consuming contaminated food (such as moldy grains containing aflatoxin) can harm the liver of both individuals.

High-risk individuals should undergo abdominal ultrasound and AFP testing every six months.

4. Esophageal cancer

As seen in the earlier case, esophageal cancer is closely linked to shared eating habits.

Regularly consuming very hot foods (above 65°C), eating quickly without chewing properly, or frequently eating pickled and irritating foods can damage the esophageal lining over time.

Endoscopy is considered the most effective method for diagnosis.

5. Stomach cancer

The bacterium Helicobacter pylori (H. pylori) plays a key role in stomach cancer among couples.

This bacterium can easily spread through shared meals, utensils, or close contact. If one partner is infected, the other is at high risk of infection and related stomach damage.

Breath tests or regular endoscopy can help detect and eliminate the bacteria early.

Expert advice

“Couple’s cancer” is not inevitable.

When one partner is diagnosed, it should serve as a warning signal for the other to review their lifestyle and undergo health screening as soon as possible. Making positive changes together is one of the most effective ways to protect long-term health and family well-being.