1 Osteochondrodysplasias -- 1.1 Growth Defects of Tubular Bones and/or Spine -- 1.2 Abnormalities of Density of Cortical Diaphyseal Structure and/or Metaphyseal Modeling -- 2 Dysostoses (Malformation of Individual Bones Singly or in Combination) -- 2.1 Dysostoses with Cranial and Facial Involvement -- 2.2 Dysostoses with Predominant Involvement of Extremities -- 3 Idiopathic Osteolyses -- 3.1 Phalangeal Acro-Osteolysis -- 3.2 Carpotarsal Osteolysis -- 4 Chromosomal Aberrations -- 4.1 Trisomy 18 Syndrome -- 4.2 Trisomy 21 -- 4.3 Turnerโs Syndrome -- 5 Primary Growth Disturbances -- 5.1 Cornelia de Langeโs Syndrome -- 5.2 Marfanโs Syndrome -- 6 Metabolic Bone Diseases -- 6.1 Primary Diseases -- 6.2 Acquired Diseases -- 7 Other Disorders of Bones and Joints -- 7.1 Constitutional Diseases -- 7.2 Endocrine Diseases -- 7.3 Arthritis and Osteomyelitis -- 7.4 Bone Tumors -- 7.5 Chemical Agents -- 7.6 Miscellaneous Conditions

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