Disease Name Symbol Acronym
Obesity Due to Sim1 Deficiency OBS060
Obesity-Hypoventilation Syndrome OBS037
Obesity, Early-Onset, with Adrenal Insufficiency and Red Hair OBS081
Obesity, Hyperphagia, and Developmental Delay OBS015
Obsessive-Compulsive Disorder OBS002
Obsessive-Compulsive Personality Disorder OBS003
Obstructive Hydrocephalus OBS004
Obstructive Jaundice OBS001
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, X-Linked OCL016
Ocular Cancer OCL009
Ocular Cicatricial Pemphigoid OCL020
Ocular Dominance OCL052
Ocular Hyperemia OCL004
Ocular Hypertension OCL006
Ocular Hypotension OCL010
Ocular Melanoma OCL022
Ocular Motility Disease OCL011
Ocular Motor Apraxia OCL069
Ocular Toxoplasmosis OCL025
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
Ogden Syndrome OGD001
Oguchi Disease 1 OGC001
Oguchi Disease 2 OGC002
Ohdo Syndrome OHD004
Ohdo Syndrome, Sbbys Variant OHD005
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 Idiopathic Arthritis OLG020
Oligoastrocytoma OLG006
Oligocone Trichromacy OLG014
Oligodendroglioma OLG002
Oligodontia-Colorectal Cancer Syndrome OLG005
Oligohydramnios OLG003
Oligomeganephronia OLG021
Oligospermia OLG001
Oliver Syndrome OLV002
Oliver-Mcfarlane Syndrome OLV004
Olivopontocerebellar Atrophy OLV001
Omenn Syndrome OMN001
Omodysplasia OMD003
Omodysplasia 1 OMD001
Omodysplasia 2 OMD002
Omphalocele OMP004
Omphalocele, Autosomal OMP009
Omsk Hemorrhagic Fever OMS001
Onchocerciasis ONC002
Oncocytic Breast Carcinoma ONC001
Oncocytoma ONC007
Oncogenic Osteomalacia ONC003
Onychomatricoma ONY005
Oocyte Maturation Defect 1 OCY003
Oocyte Maturation Defect 2 OCY002
Oocyte Maturation Defect 3 OCY004
Oocyte Maturation Defect 4 OCY005
Open-Angle Glaucoma OPN001
Ophthalmia Neonatorum OPH002
Ophthalmomyiasis OPH001
Opiate Dependence OPT003
Opioid Abuse OPD001
Opioid Addiction OPD006
Opioid Dependence 1 OPD004
Opisthorchiasis OPS001
Opitz Gbbb Syndrome, Type I OPT051
Opitz Gbbb Syndrome, Type Ii OPT050
Opitz-Gbbb Syndrome OPT048
Opitz-Kaveggia Syndrome OPT054
Opportunistic Bacterial Infectious Disease OPP001
Opportunistic Mycosis OPP002
Oppositional Defiant Disorder OPP004
Opsismodysplasia OPS002
Opsoclonus-Myoclonus Syndrome OPS006
Optic Atrophy 1 OPT053
Optic Atrophy 10 with or Without Ataxia, Mental Retardation, and Seizures OPT062
Optic Atrophy 11 OPT064
Optic Atrophy 2 OPT023
Optic Atrophy 3, Autosomal Dominant OPT068
Optic Atrophy 4 OPT059
Optic Atrophy 5 OPT024
Optic Atrophy 6 OPT025
Optic Atrophy 7 with or Without Auditory Neuropathy OPT074
Optic Atrophy 8 OPT060
Optic Atrophy 9 OPT065
Optic Atrophy with or Without Deafness, Ophthalmoplegia, Myopathy, Ataxia, and Neuropathy OPT066 DOA+
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, Bilateral OPT070
Optic Nerve Neoplasm OPT008
Optic Nerve Sheath Meningioma OPT002
Optic Neuritis OPT009
Optic Papillitis OPT010
Optic Pathway Glioma OPT032
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
Oral-Facial-Digital Syndrome with Short Stature and Brachymesophalangia ORL027
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, Hyperammonemia Due to ORN008
Ornithinemia ORN004
Ornithosis ORN001
Orofacial Cleft ORF002
Orofacial Cleft 1 ORF048 OFC
Orofacial Cleft 10 ORF028
Orofacial Cleft 11 ORF027
Orofacial Cleft 12 ORF020
Orofacial Cleft 13 ORF029
Orofacial Cleft 14 ORF031
Orofacial Cleft 15 ORF047
Orofacial Cleft 2 ORF050
Orofacial Cleft 3 ORF049
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
Orofaciodigital Syndrome Xv ORF045
Orofaciodigital Syndrome Xvi ORF046
Orofaciodigital Syndrome Xvii ORF051
Orofaciodigital Syndrome Xviii ORF052
Oromandibular Dystonia ORM002
Oropharynx Cancer ORP003
Oropouche Fever ORP002
Orotic Aciduria ORT008
Orstavik Lindemann Solberg Syndrome ORS001
Orthostatic Hypotensive Disorder, Streeten Type ORT010
Orthostatic Intolerance ORT004
Orthostatic Proteinuria ORT001
Osgood-Schlatter's Disease OSG001
Osmotic Diarrhea OSM001
Osseous Heteroplasia, Progressive OSS012
Ossification of the Posterior Longitudinal Ligament of Spine OSS014
Ossifying Fibroma OSS001
Ossifying Fibromyxoid Tumor OSS002
Osteitis Fibrosa OST004
Osteoarthritis OST012
Osteoarthritis with Mild Chondrodysplasia OST062
Osteoblastoma OST006
Osteochondritis Dissecans OST009
Osteochondrodysplasia OST015
Osteochondrodysplasia, Complex Lethal, Symoens-Barnes-Gistelinck Type OST153
Osteochondroma OST028
Osteochondrosis OST016
Osteofibrous Dysplasia OST032
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
Osteogenesis Imperfecta, Type Xviii OST169
Osteogenic Sarcoma OST159
Osteoglophonic Dysplasia OST044
Osteoid Osteoma OST160
Osteomalacia OST011
Osteomyelitis OST017
Osteomyelitis, Sterile Multifocal, with Periostitis and Pustulosis OST167
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 OST163
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
Osteopoikilosis OST014
Osteoporosis OST002
Osteoporosis-Pseudoglioma Syndrome OST024
Osteoporosis, Juvenile OST164
Osteoporotic Fracture OST097
Osteosclerosis-Developmental Delay-Craniosynostosis Syndrome OST114
Osteosclerotic Metaphyseal Dysplasia OST168
Osteosclerotic Myeloma OST008
Ostertagiasis OST007
Otitis Externa OTT001
Otitis Media OTT002
Otodental Dysplasia OTD001
Otofaciocervical Syndrome 1 OTF004
Otofaciocervical Syndrome 2 OTF003
Otomycosis OTM001
Otopalatodigital Spectrum Disorders OTP002
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
Otospondylomegaepiphyseal Dysplasia, Autosomal Dominant OTS014
Otospondylomegaepiphyseal Dysplasia, Autosomal Recessive OTS013
Ouabain Resistance OBN001
Ovalocytosis, Southeast Asian OVL001
Ovarian Angiosarcoma OVR003
Ovarian Benign Neoplasm OVR041
Ovarian Brenner Tumor OVR010
Ovarian Cancer OVR042
Ovarian Cancer 1 OVR114
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 Dysgenesis 5 OVR115
Ovarian Embryonal Carcinoma OVR050
Ovarian Endodermal Sinus Tumor OVR051
Ovarian Endometrioid Adenofibroma OVR052
Ovarian Epithelial Cancer OVR094
Ovarian Fibrothecoma OVR097
Ovarian Germ Cell Cancer OVR112
Ovarian Germ Cell Teratoma OVR109
Ovarian Gonadoblastoma OVR009
Ovarian Hyperstimulation Syndrome OVR029
Ovarian Large-Cell Neuroendocrine Carcinoma OVR005
Ovarian Lymphoma OVR021
Ovarian Melanoma OVR104
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 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 Neuroendocrine Neoplasm OVR004
Ovary Sarcoma OVR061
Ovary Serous Adenocarcinoma OVR062
Ovary Transitional Cell Carcinoma OVR026
Overhydrated Hereditary Stomatocytosis OVR093
Overnutrition OVR063
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