Liposarcoma is a rare type of cancer that develops in fat cells within soft tissues, most commonly in the limbs, abdomen, or retroperitoneal space (the area behind the abdominal organs). It is a form of soft tissue sarcoma and can vary in behavior depending on its subtype, ranging from slow-growing tumors to more aggressive forms that spread to other parts of the body. Symptoms often include a painless, enlarging mass or swelling, though tumors in the abdomen may cause discomfort, fullness, or digestive symptoms as they grow. The exact cause is not well understood, but genetic mutations within fat cells are involved in tumor development. Diagnosis typically requires imaging studies and biopsy to determine the specific type and guide management.