Although lipomas are frequently seen, lipomas of the thigh seem to be rare. Their possible malignant character and their tendency to recur after removal are the reasons for calling attention to them. About the first clinical reference to the malignant type of lipoma found is that of Senn,1 who in discussing lipomyxoma of the neck mentions seeing a patient bearing such a tumor the size of an adult head between the adductor muscles of the thigh. In 1914, P. G. Skillern, Jr.,2 reported fibrolipomas of the thigh in a white woman, aged 54. These tumors were located on the upper inner portion of each thigh, that on the left side being the larger, about the size of a pear. Beriel and Delachanal3 described such a tumor of one year's duration, on the back of a woman's thigh. At operation, the tumor was found to take origin in