Quite unrelated diseases affecting different organs can lead to the appearance of abnormal collagen fibrils, which may be due to genetic disorders, transformation of mesenchyme cells, increased collagen synthesis or a change in the ground-substance. The simultaneous appearance of abnormal collagen fibrils and matrix vesicles containing lysosomal enzymes in the majority of our electron photomicrographs suggests an alteration in the ground-substance as a main cause of non-hereditary collagen dysplasia.
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Staubesand et al. (1980) studied this question.
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