A treatise on orthopedic surgery . hronic affection and it is thereforeoften mistaken for traumatic or so-called rheumatic synovitis. Arborescent Synovial Tuberculosis.—In this form the interiorof the joint is covered with villous proliferations of the s\movialmembrane. It is not a distinct disease, but is an irritative hy- Zumsteeg, Beit. zur. klin. CMr., B. 50, H. 1, Transactions American Orthopedic Association, vol. xi. TUBEBCULOVS DISEASE OF THE BONES AND JOINTS. 257 pertrophy that is present in syphilitic and rheumatic as well asin tuberculous joints. Its especial interest lies in
A treatise on orthopedic surgery . hronic affection and it is thereforeoften mistaken for traumatic or so-called rheumatic synovitis. Arborescent Synovial Tuberculosis.—In this form the interiorof the joint is covered with villous proliferations of the s\movialmembrane. It is not a distinct disease, but is an irritative hy- Zumsteeg, Beit. zur. klin. CMr., B. 50, H. 1, Transactions American Orthopedic Association, vol. xi. TUBEBCULOVS DISEASE OF THE BONES AND JOINTS. 257 pertrophy that is present in syphilitic and rheumatic as well asin tuberculous joints. Its especial interest lies in the fact thatthe hypertrophied synovial growths may cause mechanical inter-ference with the function of the joint. Arborescent villous proliferations are formed of adipose andfibrous tissue covered with a layer of round cells. The hyper-trophied masses which project into the joint are often of largesize (lipoma arborescens), attached to the synovial membraneby a smaller pedicle. They are single or multiple, and vary in Fig. Lipoma arborescens. (Paiutei* and Erving.) color from yellow to deep red. They may be of a soft or firmconsistency. In this form of disease, there is usually pain,limitation of motion; often the swollen joint is irregular inoutline; the hypertrophied synovial prolongations are some-times apparent on palpation.^ The exact diagnosis is usuallymade only after an exploratory incision, and in such an eventthe removal of the larger growths would be indicated. Theoutcome depends, of course, upon the cause, the hypertrophydepending usually on an underlying tuberculous, syphilitic, orother chronic disease. In the instances in which the hyper-trophied tissue is in itself the cause of the disability by inter-ference with function, relief may follow its removal. Rice Bodies.—Rice bodies are small, grayish-white bodies .re-sembling cucumber seeds .that are found in certain forms ofsynovial disease, and particularly in tuberculosis of tendon ^ Painter and Erving
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