. Lectures on surgical pathology : delivered at the Royal College of Surgeons of England. or of ulceration. While the articular cartilages are passing throughthe stages of fibrous degeneration, and are being gradually removed,the subjacent bone is assuming the peculiar hardness which has beentermed eburnation, or porcellaneous change. ISTow, this changeis effected by the formation of very imperfect bone; of bone that hasno well-formed corpuscles; and it resembles the result of mere calcare-ous degeneration rather than a genuine ossifying induration. And itscharacter as a degeneration is furthe
. Lectures on surgical pathology : delivered at the Royal College of Surgeons of England. or of ulceration. While the articular cartilages are passing throughthe stages of fibrous degeneration, and are being gradually removed,the subjacent bone is assuming the peculiar hardness which has beentermed eburnation, or porcellaneous change. ISTow, this changeis effected by the formation of very imperfect bone; of bone that hasno well-formed corpuscles; and it resembles the result of mere calcare-ous degeneration rather than a genuine ossifying induration. And itscharacter as a degeneration is further declared in this ; that it is proneto destructive perforating ulceration, which often gives a peculiarworm-eaten appearance to the bones thus diseased.* * Hein (Virchows Archiv, B. xiii. p. 18, 1858) states that the worm-eaten apertures areoccupied in the recent state with villous-like processes of the degenerate fibro-cartilage. A INTERSTITIAL ABSORPTION OF INFLAMED PARTS. 281 With these changes in rheumatic bones we may also cite, as instancesof absorption during slow inflammation
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