GPT and lipoma: However, both ALT/WDL and lipoma consist of more than 75% fat, and the features of ALT/WDL and benign lipomatous tumors extensively overlap.[69] Therefore, the differentiation between lipoma and ALT/WDL using CT or MRI, especially in a small mass in the oral region like our case, is considered very difficult.[68,69] This is why histopathological examination is mandatory.[7] Besides, we did not use contrast medium considering the patient's burden on the kidney, which made preoperative diagnosis more challenging.