Sarcoma is actually a tumor that, in the early stages, does not have any symptoms. They can be made out of any type of body tissue, from fat and muscle to bone, cartilage, or even deep skin tissues. Despite its wide variety, it’s a very rare type of cancer to have as an adult, with only around 1 percent of all adult patients with cancer having sarcoma.
This, however, makes it very common in children, where sarcoma accounts for 15 to 20 percent of all cancers found in children. Because they just grow out as anomalies, without being connected to the surface where they would be easier to spot, sarcoma tumors end up being very large when they start causing symptoms in patients.
The only way to diagnose sarcoma tumors, even in the event that they are caught at an early stage, is through biopsy. Any other types of less invasive ways of diagnosis, including blood markers, are inefficient as the tumor doesn’t produce them. Unless the patient has a high risk of developing such cancer, it’s not a screening done very frequently.
Unfortunately, it is best to try to catch this type of tumor at as early a stage as possible, as the only way to cure it is through surgery: removing the tumor and hoping the cancerous cells haven’t spread further. Any other types of treatment have proven not to be as effective.