Liposarcoma is a malignant mesenchymal tumor defined as a rare cancer due to its low incidence rate. The most common location of liposarcoma is in the extremities, followed by retroperitoneum, with the bone and trunk being the less frequent presentations. The most common histological subtype is well-differentiated liposarcoma, which has the highest local recurrence, is slow-growing, and is insensitive to chemo and radiotherapy. We present the case of a 62-year-old male patient with a 10-year-growth mass in the dorsal region. A computed tomography scan showed a huge mass in the right dorsal space with a malignant lipomatous appearance, which required surgical removal of a mass of 2,800 g.