PRIMARY sarcomas of the eyelids are of comparatively rare occurrence. Although several types have been recognized, a certain amount of confusion has resulted from efforts to draw an exact histologic delineation. Various types of tissue and cell formation are consistently present in one tumor, some of which can be only imperfectly differentiated. Reference in the literature to malignant growths of the eyelids exhibiting myxosarcomatous elements are infrequent; that of van Duyse and Cruyl 1 is typical. These authors reported the case of a girl 7 years of age who had been struck by a rope nine weeks prior to her admission to the hospital, on July 23, 1887. A week after the blow had been received, a small tumor, resembling a chalazion, was noted on the left upper eyelid. For a week the growth remained quiescent and then enlarged rapidly. Four days after hospitalization, during which time further growth was