As is known, Masson described in 1924 a peculiar form of tumor which he called a glomic tumor. These tumors are usually localized in the nail bed, but they are also described as occurring in other parts of the skin of the extremities and of the coccygeal region. Usually they lie below the epidermis in the deeper layers of the skin. Clinically they are characterized by more or less severe pain which occurs in sudden transient attacks and is frequently occasioned by pressure on the tumor, or exposure to changes of temperature, especially cold. In a number of instances it has been possible to demonstrate in the extremity which is the site of the tumor some disturbance of the sympathetic nervous system in the form of higher or lower temperatures, hyperhidrosis, etc. Stout, who made a thorough examination of the literature published prior to Masson's paper, has been able to show that this form of tumor was by no means unknown previously, but that it had been described under the name of angiosarcoma, perithelioma, etc. Clinically, it had been the object of observation at a very early date, and in 1812 Wood gave an extensive description of a number of cases, under the name of “painful subcutaneous tubercle.” From Stout's detailed account it is seen that multiple tumors of this character have been observed only twice. Having had the opportunity of observing two additional cases of the kind, one of which presents a localization of the tumors which, as far as I can find, has hitherto been unknown, I believe that a report may be of interest. Case I: N. N., thirty-three years old, was born in 1903. At the age of eight or nine he began to suffer from sharp, intensive aching localized in the right ankle and around the Achilles tendon. The pain began suddenly and lasted for about an hour to as much as twenty-four hours. It would then disappear almost instantaneously and the patient would be free from trouble for some days, sometimes as long as a week. At the age of twenty he was admitted for the first time to the hospital, as the condition had become so aggravated that he was unable to work. He was given massage but became no better. On readmission to the same hospital in 1927, a periarterial sympathectomy was carried out, followed, one month later, by laminectomy with resection of a number of the posterior nerve roots. This brought about an amelioration of the symptoms together with partial anesthesia in the right foot and leg. Later on, however, the condition again grew worse.