Leiomyosarcoma is a rare type of cancer that originates in smooth muscle tissue, which is found in various organs such as the uterus, stomach, and blood vessels. It is classified as a soft tissue sarcoma and can occur in both adults and children. Symptoms may vary depending on the tumor's location and size, but they often include pain or swelling in the affected area. Diagnosis typically involves imaging tests like MRI or CT scans, followed by a biopsy to confirm the presence of cancer cells. Treatment options may include surgery, radiation therapy, and chemotherapy, depending on the tumor's stage and location. Early detection is crucial for improving outcomes.