This is a rare disease, showing small, firm, pinkish to purplish, pea to bean- sized painless nodules, to which the above name was applied by Crocker, Campbell and Williams in 1894. The initial lesions are convex, but by coalescence tend to form elevated, sharply defined infiltrations, usually free from subjective sensations. In case of unusual severity nodular tumours may develop. The parts commonly affected are the extensor surfaces of the legs, especially the elbows, knees, fingers and toes, although the lesions have been found upon the palms, soles, buttocks and ears.
Etiology and Pathology. Females, especially children or young adults, are more commonly affected. Gout and rheumatism have been urged as etiological factors. Pathologically the nodules appear to be fibromata of inflammatory origin.
Progenosis and Treatment. This disease is usually persistent although involution may ensue. Treatment is unsatisfactory but individual lesions have been made to disappear by the application of the X-rays, solidified carbon dioxid, liquor carbonis detergens and other more simple external treatment. Arsenic may be studied.