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Disease	Synonyms	Description	Articles	Phenotypes
orbital cellulitis	orbital cellulitis	An acute orbital inflammation that is characterize..[+] An acute orbital inflammation that is characterized by painful orbital mass and has_symptom eyelid edema, has_symptom erythema, has_symptom chemiosis, has_symptom proptosis, has_symptom blurred vision, has_symptom headache, has_symptom fever and has_symptom double vision. [-]
ornithosis	psittacosis	A primary bacterial infectious disease that result..[+] A primary bacterial infectious disease that results_in systemic infection, has_material_basis_in Chlamydia psittaci, which is transmitted_by inhaling aerosolized dried droppings or transmitted_by contact with infected birds. The infection has_symptom fever, has_symptom headache, has_symptom rash, has_symptom chills, and has_symptom pneumonia. [-]
osteoporosis		A bone resorption disease characterized by decreas..[+] A bone resorption disease characterized by decreased density of normally mineralized bone which results_in the thinning of bone tissue and decreased mechanical strength. [-]	1 articles
oculomotor nerve paralysis	III nerve palsy; IIIrd nerve Paralysis; Third cran.. [+] III nerve palsy; IIIrd nerve Paralysis; Third cranial nerve paralysis, NOS; Third cranial nerve paralysis [-]	n_a
onchocerciasis	Onchocerca volvulus infection; Infection by Onchoc.. [+] Onchocerca volvulus infection; Infection by Onchocerca volvulus (disorder); volvulosis; Infection by Onchocerca volvulus [-]	A filariasis that involves parasitic infection cau..[+] A filariasis that involves parasitic infection caused by the nematode Onchocerca volvulus, which is transmitted to humans through the bite of a blackfly of the genus Simulium. The worms spread throughout the body and, when they die, cause intense itching and a strong immune system response that can destroy nearby tissue. The symptoms include pruritus, dermatitis, blindness, onchocercomata (subcutaneous nodules), and lymphadenopathy. [-]
oculopharyngeal muscular dystrophy	Oculopharyngeal muscular dystrophy (disorder); Mus.. [+] Oculopharyngeal muscular dystrophy (disorder); Muscular dystrophy, oculopharyngeal [-]	n_a
odontoclasia		n_a
osteopoikilosis		An osteosclerosis that results_in numerous bone is..[+] An osteosclerosis that results_in numerous bone islands located_in skeleton. [-]	1 articles
otosclerosis		An otitis interna characterized by isolated endoch..[+] An otitis interna characterized by isolated endochondral bone sclerosis of the labyrinthine capsule. [-]
oligohydramnios	Oligohydramnios - delivered; antepartum oligohydra.. [+] Oligohydramnios - delivered; antepartum oligohydramnios; delivered oligohydramnios [-]	A placenta disease that is characterized by a defi..[+] A placenta disease that is characterized by a deficiency of amniotic fluid sometimes resulting in an embryonic defect through adherence between embryo and amnion. [-]
osteogenesis imperfecta	Osteopsathyrosis; Lobstein's syndrome; Vrolik's di.. [+] Osteopsathyrosis; Lobstein's syndrome; Vrolik's disease; brittle bone disease; Fragilitas ossium [-]	An osteochondrodysplasia that has_material_basis_i..[+] An osteochondrodysplasia that has_material_basis_in a deficiency in type-I collagen which results_in brittle bones and defective connective tissue. [-]	2 articles
olecranon bursitis	Bursitis of elbow; Bursitis of elbow region; Cappe.. [+] Bursitis of elbow; Bursitis of elbow region; Capped elbow; Elbow bursitis (& olecranon); Miner's elbow; Miners' elbow; Shoe boil; Elbow bursitis [-]	n_a
oculoglandular tularemia	Oculoglandular tularemia; Oculoglandular tularemia.. [+] Oculoglandular tularemia; Oculoglandular tularemia (disorder) [-]	A tularemia that results_in inflammation of eye an..[+] A tularemia that results_in inflammation of eye and swelling of lymph glands in front of the ear. [-]
osteopetrosis	Albers-Schonberg disease; marble bone	An osteosclerosis that has_material_basis_in lack ..[+] An osteosclerosis that has_material_basis_in lack of bone resorption which results_in abnormally hard and brittle bones. [-]	2 articles
optic disk drusen	optic nerve head drusen; Drusen of optic disc	n_a
obstructive jaundice	Obstructive jaundice NOS; Obstructive jaundice; Ob.. [+] Obstructive jaundice; Obstructive jaundice NOS; Obstructive jaundice NOS (disorder); Obstructive hyperbilirubinemia (disorder); Obstructive hyperbilirubinemia; Cholestatic Jaundice; Cholestatic jaundice syndrome (disorder); Cholestatic jaundice syndrome [-]	A cholestasis characterized by yellowish pigmentat..[+] A cholestasis characterized by yellowish pigmentation of the skin and sclera due to high bilirubin levels resulting from biliary tract obstruction. [-]
opisthorchiasis	Infection by Opisthorchis	A parasitic helminthiasis infectious disease that ..[+] A parasitic helminthiasis infectious disease that involves parasitic infection of the liver, pancreas and gall bladder by Opisthorchis viverrini or Opisthorchis felineus. The symptoms include dyspepsia, abdominal pain, diarrhea, constipation, hepatomegaly, cholangitis, cholecystitis, and cholangiocarcinoma. [-]
obstructive hydrocephalus		n_a
ochronosis		A connective tissue disease characterized by bluis..[+] A connective tissue disease characterized by bluish-brown discoloration of connective tissues that develops from the deposition of homogentisic acid and subsequent oxidation and polymerization reactions. [-]
oligospermia		n_a
orbital cyst		n_a
oral candidiasis	Oral moniliasis; Candidiasis of mouth; thrush; Thr.. [+] Oral moniliasis; Candidiasis of mouth; thrush; Thrush, oral [-]	A candidiasis that involves fungal infection of th..[+] A candidiasis that involves fungal infection of the mucous membrane of the mouth by Candida species, which is characterized by thick white or cream-colored deposits on inflamed mucosal membranes. [-]
olivopontocerebellar atrophy	Dejerine-Thomas syndrome; Thomas' syndrome; WADIA-.. [+] Dejerine-Thomas syndrome; Thomas' syndrome; WADIA-SWAMI SYNDROME [-]	A neurodegenerative disease that is characterized ..[+] A neurodegenerative disease that is characterized by progressive cerebellar ataxia, leading to clumsiness in body movements, veering from midline when walking, wide-based stance, and falls without signs of paralysis or weakness and has_material_basis_in expansion of CAG triplet repeats (glutamine) resulting in degeneration of neuron in the cerebellum, pons and inferior olives. [-]
oropharyngeal anthrax		A gastrointestinal anthrax that results in infecti..[+] A gastrointestinal anthrax that results in infection located in mucosa of oropharynx, has_material_basis_in Bacillus anthracis, which is transmitted by ingestion of anthrax-infected meat. The infection has symptom lesions, has symptom vomiting of blood, has symptom severe diarrhea, has symptom loss of appetite. [-]
osmotic diarrhea		A dirrhea that occurs when too much water is drawn..[+] A dirrhea that occurs when too much water is drawn into the bowels. This can be the result of maldigestion (e.g., pancreatic disease or Coeliac disease), in which the nutrients are left in the lumen to pull in water. Osmotic diarrhea can also be caused by osmotic laxatives (which work to alleviate constipation by drawing water into the bowels). In healthy individuals, too much magnesium or vitamin C or undigested lactose can produce osmotic diarrhea and distention of the bowel. A person who does not have lactose intolerance can have difficulty absorbing lactose after an extraordinarily high intake of dairy products. [-]
otomycosis	Singapore ear	An otitis externa which is a disease of the ear pr..[+] An otitis externa which is a disease of the ear produced by the growth of fungi in the external auditory canal. It is characterized by inflammation, pruritus, scaling and severe discomfort. The most common fungi are Aspergillus niger and Candida albicans. [-]
ophthalmomyiasis		A myiasis that involves parasitic infestation of O..[+] A myiasis that involves parasitic infestation of Oestrus ovis larvae in the eye causing severe irritation, edema, and pain. [-]
opportunistic bacterial infectious disease		A bacterial infectious disease that results_in inf..[+] A bacterial infectious disease that results_in infection by bacteria in individuals whose host defense mechanisms have been compromised. [-]
O'nyong'nyong fever		A viral infectious disease that results_in infecti..[+] A viral infectious disease that results_in infection located_in joint, has_material_basis_in Onyong-nyong virus, which is transmitted_by Anopheles gambiae, and transmitted_by Anopheles funestus mosquitoes. The infection has_symptom fever, has_symptom arthralgia, has_symptom rash, and has_symptom lymphadenitis. [-]
Oropouche fever		A viral infectious disease that results in infecti..[+] A viral infectious disease that results in infection, has_material_basis_in Oropouche virus, which is transmitted by biting midge, Culicoides paraensis. The infection has symptom fever, has symptom chills, has symptom headache, has symptom anorexia, has symptom muscle pain, has symptom joint pain, and has symptom vomiting. [-]
orofacial cleft		A physical disorder that is characterized by cleft..[+] A physical disorder that is characterized by cleft lip and/or cleft palate that result in feeding, speech and hearing problems caused by failures during development. [-]	16 articles	26 matches
occult macular dystrophy		A macular degeneration that is characterized by a ..[+] A macular degeneration that is characterized by a central cone dysfunction leading to a loss of vision with a normal fundus and normal fluorescein angiography findings. [-]
oral cavity carcinoma in situ		n_a
oculocutaneous albinism		A syndrome characterized by abnormal pigmentation ..[+] A syndrome characterized by abnormal pigmentation of the skin, hair and eyes. [-]	2 articles	6 matches
ocular albinism 1	ocular albinism; Albinism ocular 1	An eye disease that is characterized by reduced pi..[+] An eye disease that is characterized by reduced pigmentation of the iris and the resulting impairment of visual acuity without significantly affecting the color of skin or hair and has_material_basis_in mutation in the GPR143 gene that encodes segments of the melanosomes that stores melanin. [-]		5 matches
organ system cancer		A cancer that is classified based on the organ it ..[+] A cancer that is classified based on the organ it starts in. [-]	70 articles	63 matches
ornithine translocase deficiency	HHH syndrome; Hyperornithinemia-Hyperammonemia-Hom.. [+] HHH syndrome; Hyperornithinemia-Hyperammonemia-Homocitrullinuria (HHH) syndrome [-]	An amino acid metabolic disorder that has_material..[+] An amino acid metabolic disorder that has_material_basis_in deficiency of ornithine translocase resulting in the accumulation of ammonia in the blood. [-]
Ogden syndrome	OGDNS; N-alpha-acetyltransferase; N-terminal acety.. [+] OGDNS; N-alpha-acetyltransferase; N-terminal acetyltransferase deficiency; X-linked Malformation and Infantile Lethality Syndrome [-]	A syndrome characterized by postnatal growth failu..[+] A syndrome characterized by postnatal growth failure, severely delayed psychomotor development, variable dysmorphic features, and hypotonia and has_material_basis_in X-linked recessive or X-linked dominant mutation in the NAA10 gene on chromosome Xq28. [-]
orotic aciduria		A pyrimidine metabolic disorder that is characteri..[+] A pyrimidine metabolic disorder that is characterized by an excessive secretion of orotic acid in urine. [-]
oculogyric crisis		A focal dystonia that is characterized by a prolon..[+] A focal dystonia that is characterized by a prolonged involuntary upward deviation of the eyes. [-]
oromandibular dystonia		A focal dystonia that is characterized by distorti..[+] A focal dystonia that is characterized by distortions of the mouth and tongue. [-]
obstructive sleep apnea	obstructive sleep apnea syndrome	A sleep apnea that is characterized by repeated co..[+] A sleep apnea that is characterized by repeated collapse and obstruction of the upper airway during sleep, which results in reduced airflow (hypopnea) or complete airflow cessation (apnea), oxygen desaturation, and arousals from sleep. [-]
oppositional defiant disorder		n_a
oral squamous cell carcinoma	mouth squamous cell carcinoma	An oral cavity cancer that has_material_basis_in s..[+] An oral cavity cancer that has_material_basis_in squamous cells. [-]
ovarian melanoma		An ovarian cancer that has_material_basis_in melan..[+] An ovarian cancer that has_material_basis_in melanoctyes. [-]
ovarian serous carcinoma		An ovarian carcinoma that has_material_basis_in th..[+] An ovarian carcinoma that has_material_basis_in the lining of the ovary and produces a serum-like fluid. [-]
ovarian clear cell carcinoma	clear-cell ovarian carcinoma	An ovarian carcinoma that has_material_basis_in ce..[+] An ovarian carcinoma that has_material_basis_in cells with clear cytoplasm and glycogen secreting hob nail cells. [-]
Omenn syndrome	combined immunodeficiency with hypereosinophilia	A severe combined immunodeficiency that has_materi..[+] A severe combined immunodeficiency that has_material_basis_in the RAG1 and RAG2 genes on chromosome 11p and the Artemis gene on chromosome 10p. It is characterized by erythroderma, desquamation, alopecia, chronic diarrhea, failure to thrive, lymphadenopathy, and hepatosplenomegaly. [-]
organ system benign neoplasm		A benign neoplasm that is classified by the organ ..[+] A benign neoplasm that is classified by the organ system from which it is arising from. [-]	5 articles
osteoblastoma		A bone benign neoplasm of the bone that is charact..[+] A bone benign neoplasm of the bone that is characterized by clinical and histological similarity to osteoid osteomas. [-]

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