Question

what is mesothelioma, and how is it primarily caused?

a type of skin cancer caused by sun exposure

a bacterial infection that occurs in the lungs caused by pollution

a type of cancer affecting the abdominal lining or pleural cavity, primarily caused by asbestos exposure

a type of cancer that occurs due to viral infections

Explanation:

Define mesothelioma and its primary cause

Mesothelioma is a rare and aggressive form of cancer that develops in the thin layer of tissue (mesothelium) covering the internal organs, most commonly the lining of the lungs (pleural cavity) and the abdomen.

Identify the primary risk factor

The primary and most well-documented cause of mesothelioma is exposure to asbestos fibers. When inhaled or swallowed, these microscopic fibers can become permanently trapped in the body's tissues, leading to chronic inflammation, scarring, and genetic damage that can eventually cause cancer.

Evaluate the given options

• Option 1 describes skin cancer from sun exposure (melanoma/carcinoma).
• Option 2 describes a bacterial infection (such as tuberculosis or bacterial pneumonia).
• Option 3 correctly identifies mesothelioma as a cancer of the abdominal lining or pleural cavity primarily caused by asbestos exposure.
• Option 4 describes cancers linked to viral infections (such as HPV or HBV related cancers).

Answer:

• A type of skin cancer caused by sun exposure
• A bacterial infection that occurs in the lungs caused by pollution
• A type of cancer affecting the abdominal lining or pleural cavity, primarily caused by asbestos exposure (Correct answer)
• A type of cancer that occurs due to viral infections