Delirium Dementia Depression Diets Dyslipidemia Dehydration DiGeorge Syndrome Digestive Tract Defects Down Syndrome (Trisomy 21; Trisomy G) Dyslexia Development of Sexuality Drug and Substance Use and Abuse Diphtheria Digestive Disorders Diabetes Mellitus (DM) Depression Divorce Deep vein thrombosis Dandy Walker Malformation Danon Disease De Barsy Syndrome De Santis Cacchione Syndrome Degos Disease Dejerine Sottas Disease Dengue Fever Dentin Dysplasia, Coronal Dentin Dysplasia, Type I Dentinogenesis Imperfecta Type III Depersonalization Disorder Dercum's Disease Dermatitis Herpetiformis Dermatitis, Atopic Dermatitis, Contact Dermatomyositis Desmoid Tumor Dextrocardia with Situs Inversus Diabetes, Insulin Dependent Diastrophic Dysplasia Diencephalic Syndrome Diffuse Idiopathic Skeletal Hyperostosis DiGeorge Syndrome Dilatation of the Pulmonary Artery, Idiopathic Disaccharide Intolerance I Distal Myopathy Diverticulitis Diverticulosis DOOR Syndrome Down Syndrome Dracunculosis Drash Syndrome Dravet Syndrome Duane Syndrome Dubin Johnson Syndrome Dubowitz Syndrome Duodenal Atresia or Stenosis Dupuytren's Contracture Dyggve Melchior Clausen Syndrome Dysautonomia, Familial Dyschondrosteosis Dyskeratosis Congenita Dyslexia Dysplasia, Epiphysealis Hemimelica Dysplasia, Fibrous Dysthymia Dystonia Dystrophy, Asphyxiating Thoracic Dystrophy, Myotonic