Yes, it is possible to have a sarcoma for 20 years, though it is relatively uncommon. Sarcomas are cancers that form in the body's connective tissues, such as bone, muscle, fat, and cartilage. They can occur anywhere in the body, and they are typically aggressive, fast-growing tumors. While some sarcomas can grow slowly, it is usually rare for them to remain undetected for such a long period.
In general, sarcomas are more likely to be found at an early stage if they are located in a visible area of the body, such as the arms or legs. However, because sarcomas can occur almost anywhere in the body, they can be difficult to detect in areas that are not as easily visible. For this reason, it is possible for a sarcoma to remain undetected for 20 years if it is located in an area of the body that is not easily seen.
It is important to note that if a sarcoma is left undetected for an extended period of time, it may be more difficult to treat successfully. As the tumor grows, it can spread to other areas of the body and become more aggressive. Therefore, it is important to be aware of any changes in the body that could be indicative of a sarcoma and to seek medical attention as soon as possible.