👉 A myofibroma is a benign tumor that arises from the fibroblasts in muscle cells. It can be either benign or malignant depending on its size and location, with some tumors being thought of as cancerous. Myofibroma is most commonly found in the muscles of the upper body, including the arms, legs, and back, but it can also occur elsewhere in the body. It's important to note that myofibroma is not a common condition and is often associated