Disease Name Symbol Acronym
O Donnell Pappas Syndrome ODN003
Obesity OBS005 OBESITY
Obesity Bmiq11 OBS048
Obesity Bmiq12 OBS041
Obesity Bmiq18 OBS059
Obesity Bmiq4 OBS043
Obesity Due to Congenital Leptin Deficiency OBS050 LEPD
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 PC1 DEFICIENCY
Obesity, Adrenal Insufficiency, and Red Hair Due to Pomc Deficiency OBS020 POMCD
Obesity, Hyperphagia, and Developmental Delay OBS015 OBHD
Obesity, Mc4r-Related OBS008
Obesity, Morbid, Due to Leptin Deficiency OBS063 LEPD
Obesity, Morbid, Due to Leptin Receptor Deficiency OBS062 LEPRD
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 OCPD
Obstructive Hydrocephalus OBS004
Obstructive Jaundice OBS001
Obstructive Sleep Apnea OBS061
Occipital Encephalocele OCC011
Occipital Horn Syndrome OCC006 OHS
Occlusion of Gallbladder OCC004
Occlusion Precerebral Artery OCC005
Occult Macular Dystrophy OCC002 OCMD
Occupational Dermatitis OCC001
Ochronosis OCH001
Ocular Albinism OCL001 OA
Ocular Albinism with Sensorineural Deafness OCL012 OASD
Ocular Albinism, Type I, Nettleship-Falls Type OCL046 OA1
Ocular Albinism, X-Linked OCL016 OA1
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 COMA
Ocular Toxoplasmosis OCL025
Oculo-Auriculo-Vertebral Spectrum OCL044 OAVD
Oculoauricular Syndrome OCL048 OCACS
Oculocutaneous Albinism OCL002 OCA
Oculodentodigital Dysplasia OCL013 ODDD
Oculodentodigital Dysplasia, Autosomal Recessive OCL047 ODDD-AR
Oculoectodermal Syndrome OCL039
Oculoglandular Tularemia OCL007
Oculogyric Crisis OCL066
Oculomaxillofacial Dysostosis OCL040
Oculomotor Nerve Paralysis OCL003
Oculopharyngeal Muscular Dystrophy OCL008 OPMD
Oculopharyngodistal Myopathy OCL063 OPDM
Odontogenic Myxoma ODN005
Odontoma ODN006
Odontoonychodermal Dysplasia ODN009 OODD
Oeis Complex OSC001
Ofd1-Related Joubert Syndrome OFD001
Ofd1-Related Retinitis Pigmentosa OFD002 RP23
Ofd1-Related Simpson-Golabi-Behmel Syndrome Type 2 OFD003
Oguchi Disease-1 OGC003 CSNBO1
Oguchi Disease-2 OGC004 CSNBO2
Ohdo Syndrome OHD004
Ohdo Syndrome, Maat-Kievit-Brunner Type OHD001
Ohdo Syndrome, X-Linked OHD003 OHDOX
Okihiro Syndrome Due to 20q13 Microdeletion OKH002
Okihiro Syndrome Due to a Point Mutation OKH001
Okt4 Epitope Deficiency OKT001
Okur-Chung Neurodevelopmental Syndrome OKR001 OCNDS
Olecranon Bursitis OLC001
Olfactory Groove Meningioma OLF002
Olfactory Nerve Neoplasm OLF004
Olfactory Neuroblastoma OLF005
Oligoarticular Juvenile Idiopathic Arthritis OLG020
Oligoastrocytoma OLG006 MOA
Oligocone Trichromacy OLG014
Oligodendroglioma OLG002
Oligodontia-Colorectal Cancer Syndrome OLG005 ODCRCS
Oligohydramnios OLG003
Oligospermia OLG001
Oliver Syndrome OLV002
Oliver-Mcfarlane Syndrome OLV004 OMCS
Olivopontocerebellar Atrophy OLV001 OPCA
Olmsted Syndrome OLM001 OLMS
Olmsted Syndrome, X-Linked OLM002 OLMSX
Omenn Syndrome OMN001 OS
Omodysplasia OMD003
Omodysplasia 1 OMD001 OMOD1
Omodysplasia 2 OMD002 OMOD2
Omphalocele OMP004
Omsk Hemorrhagic Fever OMS001
Onchocerciasis ONC002
Oncocytic Breast Carcinoma ONC001
Oncogenic Osteomalacia ONC003 OO
Onychomatricoma ONY005
Oocyte Maturation Defect OCY001 OOMD1
Oocyte Maturation Defect 2 OCY002 OOMD2
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 GBBB1
Opitz Gbbb Syndrome, Type Ii OPT050 GBBB2
Opitz-Gbbb Syndrome OPT048
Opitz-Kaveggia Syndrome OPT054 OKS
Opportunistic Bacterial Infectious Disease OPP001
Opportunistic Mycosis OPP002
Oppositional Defiant Disorder OPP004
Oprm1-Related Altered Drug Metabolism OPR002
Opsismodysplasia OPS002 OPSMD
Opsoclonus-Myoclonus Syndrome OPS006 OMS
Optic Atrophy 1 OPT053 OPA1
Optic Atrophy 1 and Deafness OPT022
Optic Atrophy 10 with or Without Ataxia, Mental Retardation and Seizures OPT063 OPA10
Optic Atrophy 11 OPT064 OPA11
Optic Atrophy 2 OPT023 OPA2
Optic Atrophy 3 with Cataract OPT049 OPA3
Optic Atrophy 4 OPT059
Optic Atrophy 5 OPT024
Optic Atrophy 6 OPT025 OPA6
Optic Atrophy 7 OPT057 OPA7
Optic Atrophy 8 OPT060 OPA9
Optic Atrophy Plus Syndrome OPT055 DOA+
Optic Atrophy Type 9 OPT061 OPA9
Optic Disc Anomalies with Retinal and/or Macular Dystrophy OPT058 ODRMD
Optic Disk Drusen OPT001
Optic Nerve Disease OPT006
Optic Nerve Glioma OPT007
Optic Nerve Hypoplasia OPT037 BONH
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 ALS12
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 OSMF
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 ORBIT
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 OTCD
Ornithinemia ORN004
Ornithosis ORN001
Orofacial Cleft ORF002
Orofacial Cleft 10 ORF028 OFC10
Orofacial Cleft 11 ORF027 OFC11
Orofacial Cleft 12 ORF020
Orofacial Cleft 13 ORF029
Orofacial Cleft 14 ORF031
Orofacial Cleft 4 ORF023
Orofacial Cleft 5 ORF014 OFC5
Orofacial Cleft 6 ORF025 OFC6
Orofacial Cleft 9 ORF024
Orofacial Granulomatosis ORF044
Orofaciodigital Syndrome ORF001 OFDS
Orofaciodigital Syndrome I ORF037 OFD1
Orofaciodigital Syndrome Iii ORF038 OFD3
Orofaciodigital Syndrome Iv ORF035 OFD4
Orofaciodigital Syndrome V ORF033 OFD5
Orofaciodigital Syndrome Vi ORF034 OFD6
Orofaciodigital Syndrome Viii ORF040 OFD8
Orofaciodigital Syndrome Xiv ORF036 OFD14
Oromandibular Dystonia ORM002
Oropharynx Cancer ORP003
Oropouche Fever ORP002
Orotic Aciduria ORT008 ORAC1
Orthostatic Intolerance ORT004 OI
Orthostatic Proteinuria ORT001
Osgood-Schlatter's Disease OSG001
Osmed Syndrome OSM002 OSMED
Osmotic Diarrhea OSM001
Osseous Heteroplasia, Progressive OSS012 POH
Osseus Heteroplasia, Progressive OSS007 POH
Ossification of the Posterior Longitudinal Ligament of Spine OSS014 OPLL
Ossifying Fibroma OSS001
Ossifying Fibromyxoid Tumor OSS002
Osteitis Fibrosa OST004
Osteoarthritis OST012
Osteoarthritis 1 OST147 OS1
Osteoarthritis with Mild Chondrodysplasia OST062 OSCDP
Osteoarthritis-5 OST112 OS5
Osteoblastoma OST006
Osteochondritis Dissecans OST009 OCD
Osteochondritis Dissecans, Short Stature, and Early-Onset Osteoarthritis OST076 OD
Osteochondrodysplasia OST015
Osteochondroma OST028
Osteochondrosis OST016
Osteofibrous Dysplasia OST032 OSFD
Osteogenesis Imperfecta OST005 OI
Osteogenesis Imperfecta Levin Type OST034
Osteogenesis Imperfecta, Type I OST135 OI1
Osteogenesis Imperfecta, Type Ii OST080 OI2
Osteogenesis Imperfecta, Type Iii OST122 OI3
Osteogenesis Imperfecta, Type Iv OST121 OI4
Osteogenesis Imperfecta, Type Ix OST130 OI9
Osteogenesis Imperfecta, Type V OST124 OI5
Osteogenesis Imperfecta, Type Vi OST132 OI6
Osteogenesis Imperfecta, Type Vii OST119 OI7
Osteogenesis Imperfecta, Type Viii OST118 OI8
Osteogenesis Imperfecta, Type X OST127 OI10
Osteogenesis Imperfecta, Type Xi OST133 OI11
Osteogenesis Imperfecta, Type Xii OST128 OI12
Osteogenesis Imperfecta, Type Xiii OST123 OI13
Osteogenesis Imperfecta, Type Xiv OST109 OI14
Osteogenesis Imperfecta, Type Xv OST110 OI15
Osteogenesis Imperfecta, Type Xvi OST139 OI16
Osteogenesis Imperfecta, Type Xvii OST138 OI17
Osteoglophonic Dysplasia OST044 OGD
Osteolysis, Familial Expansile OST079 FEO
Osteomalacia OST011
Osteomyelitis OST017
Osteonecrosis OST003
Osteonecrosis of the Jaw OST115
Osteopathia Striata with Cranial Sclerosis OST022 OSCS
Osteopetrosis OST001
Osteopetrosis, Autosomal Dominant 1 OST125 OPTA1
Osteopetrosis, Autosomal Dominant 2 OST131 OPTA2
Osteopetrosis, Autosomal Recessive 1 OST126 OPTB1
Osteopetrosis, Autosomal Recessive 2 OST129 OPTB2
Osteopetrosis, Autosomal Recessive 3, with Renal Tubular Acidosis OST069 OPTB3
Osteopetrosis, Autosomal Recessive 4 OST137 OPTB4
Osteopetrosis, Autosomal Recessive 5 OST120 OPTB5
Osteopetrosis, Autosomal Recessive 6 OST134 OPTB6
Osteopetrosis, Autosomal Recessive 7 OST136 OPTB7
Osteopetrosis, Autosomal Recessive 8 OST106 OPTB8
Osteoporosis OST002 OSTEOP
Osteoporosis-Pseudoglioma Syndrome OST024 OPPG
Osteoporosis, Early-Onset Autosomal Dominant OST111
Osteoporotic Fracture OST097
Osteosarcoma, Somatic OST085 OSRC
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 OOD
Otof-Related Deafness OTF001 DFNB9
Otofaciocervical Syndrome OTF002 OTFCS1
Otofaciocervical Syndrome 2 OTF003 OTFCS2
Otomycosis OTM001
Otopalatodigital Spectrum Disorders OTP002
Otopalatodigital Syndrome OTP001
Otopalatodigital Syndrome, Type I OTP006 OPD1
Otopalatodigital Syndrome, Type Ii OTP007 OPD2
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 OSMED
Otulipenia OTL002 AIPDS
Otx2-Related Combined Pituitary Hormone Deficiency OTX001 CPHD6
Ovalocytosis, Hereditary Hemolytic OVL004 SAO
Ovalocytosis, Southeast Asian OVL001 SAO
Ovarian Angiosarcoma OVR003
Ovarian Benign Neoplasm OVR041
Ovarian Brenner Tumor OVR010
Ovarian Cancer OVR042
Ovarian Cancer, Somatic OVR078 OC
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 ODG1
Ovarian Dysgenesis 2 OVR076 ODG2
Ovarian Dysgenesis 3 OVR102 ODG3
Ovarian Dysgenesis 4 OVR107 ODG4
Ovarian Embryonal Carcinoma OVR050
Ovarian Endodermal Sinus Tumor OVR051
Ovarian Endometrioid Adenofibroma OVR052
Ovarian Epithelial Cancer OVR094 EOC
Ovarian Fibrothecoma OVR097
Ovarian Germ Cell Teratoma OVR109
Ovarian Germ Cell Tumor OVR069
Ovarian Gonadoblastoma OVR009
Ovarian Hyperstimulation Syndrome OVR029 OHSS
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 SCCO
Ovarian Solid Teratoma OVR037
Ovarian Squamous Cell Carcinoma OVR027
Ovarian Stromal Hyperthecosis OVR001
Ovary Adenocarcinoma OVR059
Ovary Epithelial Cancer OVR060
Ovary Leiomyosarcoma OVR035
Ovary Sarcoma OVR061
Ovary Serous Adenocarcinoma OVR062
Ovary Transitional Cell Carcinoma OVR026
Overnutrition OVR063
Oxyphilic Adenoma OXY002