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Medical Encyclopedia Topics beginning with "O"

• O'nyong-nyong fever see Dengue fever
• OA see Osteoarthritis
• Obesity
• Obesity hypoventilation syndrome (OHS)
• OBS see Organic brain syndrome

• Obsessive-compulsive disorder
• Obsessive-compulsive neurosis see Obsessive-compulsive disorder
• Obsessive-compulsive personality disorder
• Obstetric sonogram see Pregnancy ultrasound
• Obstetric ultrasonography see Pregnancy ultrasound

• Obstructed airway see Foreign object - inhaled or swallowed
• Obstruction of the ureteropelvic junction see UPJ obstruction
• Obstructive sleep apnea syndrome see Sleep apnea
• Obstructive uropathy
• Obstructive uropathy - bilateral - acute see Acute bilateral obstructive uropathy

• Obstructive uropathy - bilateral - chronic see Chronic bilateral obstructive uropathy
• Obstructive uropathy - unilateral - acute see Acute unilateral obstructive uropathy
• Obstructive uropathy - unilateral - chronic see Chronic unilateral obstructive uropathy
• Obtundation see Consciousness - decreased
• Occipital-frontal circumference see Head circumference

• Occlusion - renal artery see Renal artery stenosis
• Occlusion - renal vein see Renal vein thrombosis
• Occupational asthma
• Occupational bronchitis see Industrial bronchitis
• Occupational hearing loss

• OCD see Obsessive-compulsive disorder
• OCG see Oral cholecystogram
• Ochronosis see Alkaptonuria
• Ocular albinism see Albinism
• Ocular larva migrans see Visceral larva migrans

• Ocular melanoma see Melanoma of the eye
• Ocular motility examinatin see Extraocular muscle function testing
• Oculocutaneous albinism see Albinism
• Oculoglandular syndrome see Parinaud’s syndrome
• Oculomotor palsy see Cranial mononeuropathy III - compression type

• Odynophagia see Swallowing pain or burning
• OFC see Head circumference
• Off-pump coronary artery bypass see Minimally invasive heart surgery
• OG - infants see Feeding tube - infants
• Ogilvie's syndrome see Primary or idiopathic intestinal pseudo-obstruction

• Ohio River Valley fever see Histoplasmosis
• Oil see Diesel oil
• Oil of vitriol see Sulfuric acid poisoning
• Oil of wintergreen overdose see Methyl salicylate overdose
• Oily hair

• Oily skin
• Oleander
• Oligodendroglioma - adults see Brain tumor - adults
• Oligodendroglioma - children see Brain tumor - children
• Oliguria see Urine output - decreased

• Olivopontocerebellar atrophy
• Olivopontocerebellar degeneration see Olivopontocerebellar atrophy
• OME see Otitis media with effusion
• Omphalocele
• Omphalocele repair

• Ondine's curse see Primary alveolar hypoventilation
• Onychocryptosis see Ingrown toenail
• Onycholysis see Nail abnormalities
• Onychomycosis see Fungal nail infection
• Oophoritis see Pelvic inflammatory disease (PID)

• OPCA see Olivopontocerebellar atrophy
• OPCAB see Minimally invasive heart surgery
• Open angle glaucoma see Glaucoma
• Open bite see Malocclusion of teeth
• Open browlift see Forehead lift

• Open cholecystectomy see Gallbladder removal
• Open heart surgery
• Open injury bleeding see Bleeding
• Open lung biopsy
• Open pleural biopsy

• Open prostatectomy see Prostate removal
• Open thyroid biopsy see Thyroid excisional biopsy
• Open wound see Cuts and puncture wounds
• Ophthalmalgia see Eye pain
• Ophthalmia neonatorum see Neonatal conjunctivitis

• Ophthalmoscopy
• Opiate withdrawal
• Opioid intoxication
• Opisthotonos
• Oppositional defiant disorder

• Optic glioma
• Optic nerve atrophy
• Optic nerve glioma see Optic glioma
• Optic neuritis
• Oral cancer

• Oral cholecystogram
• Oral glucose tolerance test see Glucose tolerance test
• Oral hypoglycemics overdose
• Oral thrush see Thrush
• Oral thrush

• Oral ulcer see Mouth ulcers
• Orange crush overdose see Dextromethorphan overdose
• Orbit CT scan
• Orbital cellulitis
• Orbital pseudotumor

• Orbital-craniofacial surgery see Head and face reconstruction
• Orchidopexy see Undescended testicle repair
• Orchiopexy see Undescended testicle repair
• Orchitis
• Organic brain syndrome

• Organic mental disorder see Organic brain syndrome
• Orgasmic dysfunction
• Orientation see Mental status tests
• Ormond's disease see Retroperitoneal fibrosis
• Ornamental pepper poisoning see Jerusalem cherry poisoning

• Ornithosis see Psittacosis
• Oropharynx lesion biopsy
• Orthopnea see Breathing difficulty - lying down
• Orudis overdose see Ketoprofen overdose
• Osgood-Schlatter disease

• Osler-Weber-Rendu syndrome
• Osler's disease see Polycythemia vera
• Osmolality
• Osmolality - urine
• Osmotic diuresis

• Osmotic fragility
• Osteitis deformans see Paget’s disease
• Osteitis fibrosa
• Osteitis fibrosa cystica see Osteitis fibrosa
• Osteoarthritis

• Osteoarthrosis see Osteoarthritis
• Osteochondrosis see Osgood-Schlatter disease
• Osteogenesis imperfecta
• Osteogenic sarcoma see Osteosarcoma
• Osteomalacia

• Osteomalacia in children see Rickets
• Osteomas see Benign ear cyst or tumor
• Osteomyelitis
• Osteomyelitis of the skull see Malignant otitis externa
• Osteonecrosis see Aseptic necrosis

• Osteopenia - premature infants
• Osteoporosis
• Osteoporosis and aging see Aging changes in the bones - muscles - joints
• Osteosarcoma
• Ostomy - resources

• Otalgia see Earache
• Otitis
• Otitis externa - acute see Swimmer's ear
• Otitis externa - chronic see Swimmer's ear - chronic
• Otitis externa - malignant see Malignant otitis externa

• Otitis media - acute see Ear infection - acute
• Otitis media - chronic
• Otitis media with effusion
• Otoplasty see Cosmetic ear surgery
• Otorrhea see Ear discharges or bleeding

• Otosclerosis
• Otoscope see Ear examination
• Otospongiosis see Otosclerosis
• Ovalocytosis - hereditary see Hereditary ovalocytosis
• Ovarian cancer

• Ovarian cancer dangers
• Ovarian cysts
• Ovarian growths
• Ovarian hypofunction
• Ovarian mass see Ovarian growths

• Ovarian overproduction of androgens
• Oven cleaners
• Over-the-counter birth control
• Overactive bladder see Urge incontinence
• Overactive thyroid see Hyperthyroidism

• Overbite see Malocclusion of teeth
• Overbreathing see Rapid deep breathing (hyperventilation)
• Overcoming breastfeeding problems
• Overdose from drugs see Drug abuse first aid
• Overeating - resources see Eating disorders - resources

• Overgrowth - intestinal bacteria see Small bowel bacterial overgrowth
• Ovulation pain see Mittelschmerz
• Ovulation prediction test see LH urine test (home test )
• Owren's disease see Factor V deficiency
• Oxalic acid

• Oxazepam overdose
• Oxpam see Oxazepam overdose
• Oxygen therapy - infants
• Oxyuriasis see Pinworms
• Oxyuriasis test see Pinworm test

• Ozena

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