. Special pathology and therapeutics of the diseases of domestic animals. Veterinary medicine. Pathogenesis, Anatomical Changes. 955 the affected animals, the more so, as both diseases may occur simul- taneously. According to this viewpoint rachitis and osteomalacia would form processes which are identical anatomically, but which might possibly be due to different causes. But since many points are still disputed concerning the etiology and pathogenesis of both disease forms, the identification of rachitis and osteomalacia as one clinical entity of like anatomy and etiology does not appear just
. Special pathology and therapeutics of the diseases of domestic animals. Veterinary medicine. Pathogenesis, Anatomical Changes. 955 the affected animals, the more so, as both diseases may occur simul- taneously. According to this viewpoint rachitis and osteomalacia would form processes which are identical anatomically, but which might possibly be due to different causes. But since many points are still disputed concerning the etiology and pathogenesis of both disease forms, the identification of rachitis and osteomalacia as one clinical entity of like anatomy and etiology does not appear justified for the present. The relation of rac-hitis and osteomalacia to osteoiiorosis in ge^^eral (rarifica- tion of bony substance in favor of the marrow spaces) may be described as follows: Both in rachitis and in osteomalacia osteoporosis is a constant symptom, and it is either emphasized very slightly compared with the proliferative process,. Fig. 166. Pelvis of a oow ivith osieomalacia. The pubes and iscliiuni are bent, the foramen obturatum being distorted. The left internal angle of the ilium is lowered. dependent upon the age of the affected animal, on the cause and on the variable mechanical influences, or on the contrary it predominates, at times so decidedly that it appears to exist alone. It is therefore not proper, at the present stage of information, to classify general osteoporosis (with the exception of senile bony atrophy) as an indepjendent affection apart from rachitis or osteomalacia, as was recently proposed by Miwa & Stoltzner, Elliot, Theiler and others. Anatomical Changes. In well marked cases of the disease the marrow spaces of the ' l)ones are dilated, the bony cortex is thin and spongy, brittle, or then so soft that it may he cut with a knife. In very severe cases the cortical portion of the long bones is barely a few millimeters thick, the bone. Please note that these images are extracted from scanned page images that may have been digitally en
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectveterin, bookyear1912
