Final answer:
Tumors in muscles are relatively rare compared to tumors in other parts of the body. When they do occur, they can be classified as either benign or malignant. Rhabdomyosarcoma is an example of a malignant tumor that can develop in muscles.
Step-by-step explanation:
Tumors in muscles are not very common. They are relatively rare compared to tumors in other parts of the body. However, when they do occur, they can be classified as either benign or malignant. Benign tumors stay in one location and do not spread, while malignant tumors are cancerous and have the potential to spread to other parts of the body. One example of a malignant tumor that can develop in muscles is rhabdomyosarcoma.