skin biopsies taken from patients with osteogenesis imperfecta tarda and otosclerosis were compared blind by light- and electron microscopy with similar biopsies taken from normal volunteers in an effort to find common pathological features in the collagen fibres from the two patient groups , thus corroborating the theory that osteogenesis imperfecta and otosclerosis might be due to a common genetic anomaly in the form of a mesenchymal hypoplasia .
C0023931
osteogenesis imperfecta tarda
C0029434
osteogenesis imperfecta