Lipomas are relatively common clinically and are one of the more frequent types of superficial tumors, commonly occurring on the limbs and trunk. Generally, a physical examination and ultrasound are sufficient for an accurate diagnosis of a lipoma, and there is no need for the patient to undergo a CT scan. However, if a CT scan is performed, lipomas can present in the following ways: first, a regular or lobulated mass may be found under the skin with sparse blood flow and a regular shape; second, on a CT scan, lipomas appear as low-density lesions, with CT values typically ranging between -70 HU to -90 HU. Diagnosis of a lipoma can be confirmed through these two observations.