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Pycnodysostosis (PYCD) is a rare recessive inherited skeletal disease, characterized by short stature, brittle bones, and recurrent fractures, caused by variants in the Cathepsin K encoding gene that leads to impaired osteoclast-mediated bone resorption. Hypophosphatasia (HPP) is a dominant or
Pycnodysostosis is a rare hereditary bone abnormality with an autosomal recessive mode of inheritance. We report the clinical, radiologic, and endocrine status of 8 children with this rare disease. All patients had the characteristic phenotype of the disorder including short stature (8 of 8),
BACKGROUND
Pycnodysostosis is typically associated with short stature, multiple fractures without adequate trauma and high bone density on x-ray. The increased bone density is due to a genetic defect of cathepsin K, leading to dysfunctional osteoclastic bone resorption and bone remodeling. We wanted
This paper summarizes the clinical features, causative genes and treatment progress of patients with rickets-like genetic diseases, including X-linked hypophosphatemic rickets (XLH), hypophosphatasia, achondroplasia, vitamin D-dependent rickets, pycnodysostosis and ectodermal dysplasia, who visited