Disease Name Symbol Acronym
O Donnell Pappas Syndrome ODN003
Obesity OBS005
Obesity Bmiq11 OBS048
Obesity Bmiq12 OBS041
Obesity Bmiq18 OBS059
Obesity Bmiq4 OBS043
Obesity Due to Congenital Leptin Deficiency OBS050
Obesity Due to Sim1 Deficiency OBS060
Obesity Susceptibility, Adrb2-Related OBS069
Obesity Susceptibility, Adrb3-Related OBS070
Obesity Susceptibility, Agrp-Related OBS071
Obesity Susceptibility, Cartpt-Related OBS072
Obesity Susceptibility, Enpp1-Related OBS073
Obesity Susceptibility, Ghrl-Related OBS074
Obesity Susceptibility, Mc3r-Related OBS075
Obesity Susceptibility, Pomc-Related OBS076
Obesity Susceptibility, Ucp1-Related OBS077
Obesity with Impaired Prohormone Processing OBS011
Obesity, Adrenal Insufficiency, and Red Hair Due to Pomc Deficiency OBS020
Obesity, Hyperphagia, and Developmental Delay OBS015
Obesity, Mc4r-Related OBS008
Obesity, Morbid, Due to Leptin Deficiency OBS063
Obesity, Morbid, Due to Leptin Receptor Deficiency OBS062
Obesity, Nr0b2-Related OBS078
Obesity, Pparg-Related OBS009
Obesity, Ppargc1b-Related OBS079
Obesity, Pyy-Related OBS057
Obesity, Severe Bmiq9 OBS044
Obesity, Sim1-Related OBS058
Obesity, Ucp3-Related OBS056
Obsessive-Compulsive Disorder OBS002
Obsessive-Compulsive Personality Disorder OBS003
Obstructive Hydrocephalus OBS004
Obstructive Jaundice OBS001
Obstructive Sleep Apnea OBS061
Occipital Encephalocele OCC011
Occipital Horn Syndrome OCC006
Occlusion of Gallbladder OCC004
Occlusion Precerebral Artery OCC005
Occult Macular Dystrophy OCC002
Occupational Dermatitis OCC001
Ochronosis OCH001
Ocular Albinism OCL001
Ocular Albinism with Sensorineural Deafness OCL012
Ocular Albinism, Type I, Nettleship-Falls Type OCL046
Ocular Albinism, X-Linked OCL016
Ocular Cancer OCL009
Ocular Cicatricial Pemphigoid OCL020
Ocular Hyperemia OCL004
Ocular Hypertension OCL006
Ocular Hypotension OCL010
Ocular Melanoma OCL022
Ocular Motility Disease OCL011
Ocular Motor Apraxia OCL069
Ocular Toxoplasmosis OCL025
Oculo-Auriculo-Vertebral Spectrum OCL044
Oculoauricular Syndrome OCL048
Oculocutaneous Albinism OCL002
Oculodentodigital Dysplasia OCL013
Oculodentodigital Dysplasia, Autosomal Recessive OCL047
Oculoectodermal Syndrome OCL039
Oculoglandular Tularemia OCL007
Oculogyric Crisis OCL066
Oculomaxillofacial Dysostosis OCL040
Oculomotor Nerve Paralysis OCL003
Oculopharyngeal Muscular Dystrophy OCL008
Oculopharyngodistal Myopathy OCL063
Odontogenic Myxoma ODN005
Odontoma ODN006
Odontoonychodermal Dysplasia ODN009
Oeis Complex OSC001
Ofd1-Related Joubert Syndrome OFD001
Ofd1-Related Retinitis Pigmentosa OFD002
Ofd1-Related Simpson-Golabi-Behmel Syndrome Type 2 OFD003
Oguchi Disease-1 OGC003
Oguchi Disease-2 OGC004
Ohdo Syndrome OHD004
Ohdo Syndrome, Maat-Kievit-Brunner Type OHD001
Ohdo Syndrome, X-Linked OHD003
Okihiro Syndrome Due to 20q13 Microdeletion OKH002
Okihiro Syndrome Due to a Point Mutation OKH001
Okt4 Epitope Deficiency OKT001
Okur-Chung Neurodevelopmental Syndrome OKR001
Olecranon Bursitis OLC001
Olfactory Groove Meningioma OLF002
Olfactory Nerve Neoplasm OLF004
Olfactory Neuroblastoma OLF005
Oligoarticular Juvenile Arthritis OLG015
Oligoastrocytoma OLG006
Oligocone Trichromacy OLG014
Oligodendroglioma OLG002
Oligodontia-Colorectal Cancer Syndrome OLG005
Oligohydramnios OLG003
Oligospermia OLG001
Oliver Syndrome OLV002
Oliver-Mcfarlane Syndrome OLV004
Olmsted Syndrome OLM001
Olmsted Syndrome, X-Linked OLM002
Omenn Syndrome OMN001
Omodysplasia OMD003
Omodysplasia 1 OMD001
Omodysplasia 2 OMD002
Omphalocele OMP004
Omsk Hemorrhagic Fever OMS001
Onchocerciasis ONC002
Oncocytic Breast Carcinoma ONC001
Oncogenic Osteomalacia ONC003
Onychomatricoma ONY005
Oocyte Maturation Defect OCY001
Oocyte Maturation Defect 2 OCY002
Open-Angle Glaucoma OPN001
Ophthalmia Neonatorum OPH002
Ophthalmomyiasis OPH001
Opiate Dependence OPT003
Opioid Abuse OPD001
Opioid Dependence 1 OPD004
Opisthorchiasis OPS001
Opitz Gbbb Syndrome, Type I OPT051
Opitz Gbbb Syndrome, Type Ii OPT050
Opitz-Kaveggia Syndrome OPT054
Opportunistic Bacterial Infectious Disease OPP001
Opportunistic Mycosis OPP002
Oppositional Defiant Disorder OPP004
Oprm1-Related Altered Drug Metabolism OPR002
Opsismodysplasia OPS002
Opsoclonus-Myoclonus Syndrome OPS006
Optic Atrophy 1 OPT053
Optic Atrophy 1 and Deafness OPT022
Optic Atrophy 10 with or Without Ataxia, Mental Retardation, and Seizures OPT062
Optic Atrophy 2 OPT023
Optic Atrophy 3 with Cataract OPT049
Optic Atrophy 4 OPT059
Optic Atrophy 5 OPT024
Optic Atrophy 6 OPT025
Optic Atrophy 7 OPT057
Optic Atrophy 8 OPT060
Optic Atrophy Plus Syndrome OPT055
Optic Atrophy Type 9 OPT061
Optic Disc Anomalies with Retinal and/or Macular Dystrophy OPT058
Optic Disk Drusen OPT001
Optic Nerve Disease OPT006
Optic Nerve Glioma OPT007
Optic Nerve Hypoplasia OPT037
Optic Nerve Neoplasm OPT008
Optic Nerve Sheath Meningioma OPT002
Optic Neuritis OPT009
Optic Papillitis OPT010
Optic Pathway Glioma OPT032
Optn-Related Amyotrophic Lateral Sclerosis OPT036
Oral Antidiabetic Drugs Toxicity or Dose Selection ORL023
Oral Cancer ORL011
Oral Candidiasis ORL005
Oral Cavity Cancer ORL007
Oral Erosive Lichen ORL022
Oral Hairy Leukoplakia ORL019
Oral Leukoplakia ORL012
Oral Lichen Planus ORL013
Oral Mucosa Leukoplakia ORL006
Oral Squamous Cell Carcinoma ORL015
Oral Submucous Fibrosis ORL004
Oral Tuberculosis ORL003
Orbit Embryonal Rhabdomyosarcoma ORB002
Orbit Lymphoma ORB009
Orbit Rhabdomyosarcoma ORB011
Orbital Cancer ORB012
Orbital Cellulitis ORB006
Orbital Cyst ORB007
Orbital Disease ORB013
Orbital Granuloma ORB010
Orbital Leiomyoma ORB018
Orbital Lymphangioma ORB014
Orbital Melanoma ORB015
Orbital Plasma Cell Granuloma ORB008
Orbital Tenonitis ORB003
Orchitis ORC001
Organ System Benign Neoplasm ORG010
Organic Acidemia ORG002
Ornithine Transcarbamylase Deficiency ORN006
Ornithosis ORN001
Orofacial Cleft ORF002
Orofacial Cleft 10 ORF028
Orofacial Cleft 11 ORF027
Orofacial Cleft 12 ORF020
Orofacial Cleft 13 ORF029
Orofacial Cleft 14 ORF031
Orofacial Cleft 4 ORF023
Orofacial Cleft 5 ORF014
Orofacial Cleft 6 ORF025
Orofacial Cleft 9 ORF024
Orofacial Granulomatosis ORF044
Orofaciodigital Syndrome ORF001
Orofaciodigital Syndrome I ORF037
Orofaciodigital Syndrome Iii ORF038
Orofaciodigital Syndrome Iv ORF035
Orofaciodigital Syndrome V ORF033
Orofaciodigital Syndrome Vi ORF034
Orofaciodigital Syndrome Viii ORF040
Orofaciodigital Syndrome Xiv ORF036
Oromandibular Dystonia ORM002
Oropharynx Cancer ORP003
Oropouche Fever ORP002
Orotic Aciduria ORT008
Orthostatic Intolerance ORT004
Orthostatic Proteinuria ORT001
Osgood-Schlatter's Disease OSG001
Osmed Syndrome OSM002
Osmotic Diarrhea OSM001
Osseous Heteroplasia, Progressive OSS012
Osseus Heteroplasia, Progressive OSS007
Ossification of the Posterior Longitudinal Ligament of the Spine OSS010
Ossifying Fibroma OSS001
Ossifying Fibromyxoid Tumor OSS002
Osteitis Fibrosa OST004
Osteoarthritis OST012
Osteoarthritis 1 OST147
Osteoarthritis with Mild Chondrodysplasia OST062
Osteoarthritis-5 OST112
Osteoblastoma OST006
Osteochondritis Dissecans OST009
Osteochondritis Dissecans, Short Stature, and Early-Onset Osteoarthritis OST076
Osteochondrodysplasia OST015
Osteochondroma OST028
Osteochondrosis OST016
Osteofibrous Dysplasia OST032
Osteogenesis Imperfecta OST005
Osteogenesis Imperfecta Levin Type OST034
Osteogenesis Imperfecta, Type I OST135
Osteogenesis Imperfecta, Type Ii OST080
Osteogenesis Imperfecta, Type Iii OST122
Osteogenesis Imperfecta, Type Iv OST121
Osteogenesis Imperfecta, Type Ix OST130
Osteogenesis Imperfecta, Type V OST124
Osteogenesis Imperfecta, Type Vi OST132
Osteogenesis Imperfecta, Type Vii OST119
Osteogenesis Imperfecta, Type Viii OST118
Osteogenesis Imperfecta, Type X OST127
Osteogenesis Imperfecta, Type Xi OST133
Osteogenesis Imperfecta, Type Xii OST128
Osteogenesis Imperfecta, Type Xiii OST123
Osteogenesis Imperfecta, Type Xiv OST109
Osteogenesis Imperfecta, Type Xv OST110
Osteogenesis Imperfecta, Type Xvi OST139
Osteogenesis Imperfecta, Type Xvii OST138
Osteoglophonic Dysplasia OST044
Osteolysis, Familial Expansile OST079
Osteomalacia OST011
Osteomyelitis OST017
Osteonecrosis OST003
Osteonecrosis of the Jaw OST115
Osteopathia Striata with Cranial Sclerosis OST022
Osteopetrosis OST001
Osteopetrosis, Autosomal Dominant 1 OST125
Osteopetrosis, Autosomal Dominant 2 OST131
Osteopetrosis, Autosomal Recessive 1 OST126
Osteopetrosis, Autosomal Recessive 2 OST129
Osteopetrosis, Autosomal Recessive 3, with Renal Tubular Acidosis OST069
Osteopetrosis, Autosomal Recessive 4 OST137
Osteopetrosis, Autosomal Recessive 5 OST120
Osteopetrosis, Autosomal Recessive 6 OST134
Osteopetrosis, Autosomal Recessive 7 OST136
Osteopetrosis, Autosomal Recessive 8 OST106
Osteoporosis OST002
Osteoporosis-Pseudoglioma Syndrome OST024
Osteoporosis, Early-Onset Autosomal Dominant OST111
Osteoporotic Fracture OST097
Osteosarcoma, Somatic OST085
Osteosclerosis-Developmental Delay-Craniosynostosis Syndrome OST114
Osteosclerotic Myeloma OST008
Ostertagiasis OST007
Ostm1-Related Autosomal Recessive Osteopetrosis OST068
Otitis Externa OTT001
Otitis Media OTT002
Oto-Palatal-Digital Syndrome OTP003
Otodental Dysplasia OTD001
Otof-Related Deafness OTF001
Otofaciocervical Syndrome OTF002
Otofaciocervical Syndrome 2 OTF003
Otomycosis OTM001
Otopalatodigital Spectrum Disorders OTP002
Otopalatodigital Syndrome OTP001
Otopalatodigital Syndrome, Type I OTP006
Otopalatodigital Syndrome, Type Ii OTP007
Otosclerosis OTS001
Otosclerosis 1 OTS005
Otosclerosis 10 OTS012
Otosclerosis 2 OTS006
Otosclerosis 3 OTS007
Otosclerosis 4 OTS008
Otosclerosis 5 OTS009
Otosclerosis 7 OTS010
Otosclerosis 8 OTS011
Otospondylomegaepiphyseal Dysplasia OTS002
Otulipenia OTL002
Otx2-Related Combined Pituitary Hormone Deficiency OTX001
Ovalocytosis, Hereditary Hemolytic OVL004
Ovalocytosis, Southeast Asian OVL001
Ovarian Angiosarcoma OVR003
Ovarian Benign Neoplasm OVR041
Ovarian Brenner Tumor OVR010
Ovarian Cancer OVR042
Ovarian Cancer, Somatic OVR078
Ovarian Carcinosarcoma OVR044
Ovarian Clear Cell Adenocarcinoma OVR034
Ovarian Clear Cell Adenofibroma OVR045
Ovarian Clear Cell Carcinoma OVR106
Ovarian Cyst OVR046
Ovarian Cystadenocarcinoma OVR047
Ovarian Cystadenoma OVR048
Ovarian Cystic Teratoma OVR017
Ovarian Disease OVR049
Ovarian Dysgenesis 1 OVR075
Ovarian Dysgenesis 2 OVR076
Ovarian Dysgenesis 3 OVR102
Ovarian Dysgenesis 4 OVR107
Ovarian Embryonal Carcinoma OVR050
Ovarian Endodermal Sinus Tumor OVR051
Ovarian Endometrioid Adenofibroma OVR052
Ovarian Epithelial Cancer OVR094
Ovarian Fibrothecoma OVR097
Ovarian Germ Cell Teratoma OVR109
Ovarian Germ Cell Tumor OVR069
Ovarian Gonadoblastoma OVR009
Ovarian Hyperstimulation Syndrome OVR029
Ovarian Large-Cell Neuroendocrine Carcinoma OVR005
Ovarian Lymphoma OVR021
Ovarian Melanoma OVR104
Ovarian Mixed Germ Cell Neoplasm OVR015
Ovarian Mucinous Adenocarcinoma OVR011
Ovarian Mucinous Adenofibroma OVR053
Ovarian Mucinous Cystadenocarcinoma OVR013
Ovarian Mucinous Neoplasm OVR054
Ovarian Primitive Germ Cell Tumor OVR056
Ovarian Remnant Syndrome OVR073
Ovarian Response to Fsh Stimulation OVR079
Ovarian Serous Adenofibroma OVR057
Ovarian Serous Carcinoma OVR105
Ovarian Serous Cystadenocarcinoma OVR012
Ovarian Serous Cystadenofibroma OVR002
Ovarian Small Cell Carcinoma OVR058
Ovarian Solid Teratoma OVR037
Ovarian Squamous Cell Carcinoma OVR027
Ovarian Stromal Hyperthecosis OVR001
Ovary Adenocarcinoma OVR059
Ovary Epithelial Cancer OVR060
Ovary Sarcoma OVR061
Ovary Serous Adenocarcinoma OVR062
Ovary Transitional Cell Carcinoma OVR026
Overnutrition OVR063
Oxyphilic Adenoma OXY002