👉 Fibrocarcinoma is a type of cancer that occurs in the muscle tissue. It is one of the most common types of cancer, with about 10-20% of all cancers occurring in the muscles or connective tissues. Fibrocarcinomas are usually benign and can be detected by imaging tests such as ultrasound, magnetic resonance imaging (MRI), or computed tomography (CT). They can also grow rapidly, which is why they often require surgery to remove them.