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About 1867 Duhring had under his observation at the Philadelphia Hospital a negro whose neck was encircled by enormous keloids, which, although black, otherwise resembled tomatoes. A photograph of this remarkable case was published in Philadelphia in 1870. A lipoma is a tumor consisting of adipose tissue.
Maloh and Punan men ornamented with Kayan tatu designs we have often encountered; but they have no designs of their own, and attach no special significance to their borrowed designs. We may note here that the ornamentation of the body by means of raised scars and keloids is not known in Borneo.
This tumor may arise from a scar in any portion of the body, and at any age. There seems to be a disposition in certain families and individuals to keloid-formations, and among negroes keloids are quite common, and often of remarkable size and conformation.
Keloids are fibromata of the true skin, which may develop spontaneously or in a scar. Although the distinction of true and false keloid has been made, it is generally discarded. According to Hebra a true typical keloid is found once in every 2000 cases of skin-disease. It is, however, particularly the false keloid, or keloid arising from cicatrices, with which we have mostly to deal.
The form of injury causing the cicatrix is no factor in the production of keloid, the sting of an insect, the prick of a needle, and even the wearing of ear-rings having been frequent causes of keloid-formations among the negro race. Collins describes a negress of ninety, born of African parents, who exhibited multiple keloids produced by diverse injuries.
At fourteen she was burned over her breasts by running against a shovelful of hot coals, and several months later small tumors appeared, which never suppurated. When a young girl a tumor was removed from the front of her neck by operation, and cicatricial tumors then spread like a band encircling one-half her neck. There were keloids over her scapulae, which followed the application of blisters.
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