Why Is Cancer Most Predominant In The Organs?
Lungs, brain, liver, colon, i.e. soft tissues, is where the vast majority of cancers hit. Even skin(which gets hit too) is an organ. Why not muscle tissue? I’ve never heard of arm cancer or knee cancer, or heart cancer. Why is muscle tissue (seemingly) immune?
This is an extremely good question. Primary tumors of the heart are very rare. In 20 years as a cancer specialist MD, I never saw one – - but these would be handled by a thoracic surgeon rather than a medical oncologist which was my specialty.
The only cancer that seems to spread to the actual heart muscle is malignant melanoma, and by then the cancer is usually many other places as well.
Skeletal muscle does develop cancer – sarcomas, but these are not common – no where near as common as breast cancer, colon cancer, lung cancer, or prostate cancer.
Some cancers are related to hormonal influences such as breast, prostate, ovarian, uterine. Some cancers are related to exposures to carcinogenic chemicals such as lung and colon cancers. This is not an adequate answer to your question – - but I think you have hit on an interesting observation.
Muscle tissue is not immune. Sarcomas may invade muscle and soft and fibrous tissue as well as fatty tissue. Bone cancer can occur anywhere and there are primary malignancies that occur in the heart. Virtually no tissue is immune altho some cancers occur more frequently than others.