PAPILLARY cystadenoma lymphomatosum is a relatively rare type of salivary gland tumor. It may be grouped roughly among the benign mixed tumors of the salivary glands but is so distinctive in its microscopic appearance that a special niche has been made for it. Because of the rarity of these tumors, one is inclined to dismiss them as pathological curiosities. However, when the surgeon is confronted with a patient with such a diagnosis, knowledge of the pathology, treatment, and prognosis are of paramount importance. We have had the opportunity to see two of these tumors within a period of four months, and these serve as the basis for this report.
REPORT OF CASES
.—A 56 year old white man entered the hospital for evaluation of low back pain. An incidental finding was a firm, nontender tumor below the posterior part of the right mandible. The mass had been present