Terminology Service < Semantic Lookup Platform

All individuals in MESHD

Label	Id	Description
Oral Submucous Fibrosis	D009914	[Irreversible FIBROSIS of the submucosal tissue of the MOUTH.]
Oral Ulcer	D019226	[A loss of mucous substance of the mouth showing local excavation of the surface, resulting from the sloughing of inflammatory necrotic tissue. It is the result of a variety of causes, e.g., denture irritation, aphthous stomatitis (STOMATITIS, APHTHOUS); NOMA; necrotizing gingivitis (GINGIVITIS, NECROTIZING ULCERATIVE); TOOTHBRUSHING; and various irritants. (From Jablonski, Dictionary of Dentistry, 1992, p842)]
Orbital Cellulitis	D054517	[Inflammation of the loose connective tissues around the ORBIT, bony structure around the eyeball. It is characterized by PAIN; EDEMA of the CONJUNCTIVA; swelling of the EYELIDS; EXOPHTHALMOS; limited eye movement; and loss of vision.]
Orbital Diseases	D009916	[Diseases of the bony orbit and contents except the eyeball.]
Orbital Fractures	D009917	[Fractures of the bones in the orbit, which include parts of the frontal, ethmoidal, lacrimal, and sphenoid bones and the maxilla and zygoma.]
Orbital Myositis	D055622	[Inflammation of the extraocular muscle of the eye. It is characterized by swelling which can lead to ischemia, fibrosis, or ORBITAL PSEUDOTUMOR.]
Orbital Neoplasms	D009918	[Neoplasms of the bony orbit and contents except the eyeball.]
Orbital Pseudotumor	D016727	[A nonspecific tumor-like inflammatory lesion in the ORBIT of the eye. It is usually composed of mature LYMPHOCYTES; PLASMA CELLS; MACROPHAGES; LEUKOCYTES with varying degrees of FIBROSIS. Orbital pseudotumors are often associated with inflammation of the extraocular muscles (ORBITAL MYOSITIS) or inflammation of the lacrimal glands (DACRYOADENITIS).]
Orchitis	D009920	[Inflammation of a TESTIS. It has many features of EPIDIDYMITIS, such as swollen SCROTUM; PAIN; PYURIA; and FEVER. It is usually related to infections in the URINARY TRACT, which likely spread to the EPIDIDYMIS and then the TESTIS through either the VAS DEFERENS or the lymphatics of the SPERMATIC CORD.]
Organophosphate Poisoning	D062025	[Poisoning due to exposure to ORGANOTHIOPHOSPHORUS COMPOUNDS., Poisoning due to exposure to ORGANOPHOSPHORUS COMPOUNDS, such as ORGANOPHOSPHATES; ORGANOTHIOPHOSPHATES; and ORGANOTHIOPHOSPHONATES.]
Ornithine Carbamoyltransferase Deficiency Disease	D020163	[An inherited urea cycle disorder associated with deficiency of the enzyme ORNITHINE CARBAMOYLTRANSFERASE, transmitted as an X-linked trait and featuring elevations of amino acids and ammonia in the serum. Clinical features, which are more prominent in males, include seizures, behavioral alterations, episodic vomiting, lethargy, and coma. (Menkes, Textbook of Child Neurology, 5th ed, pp49-50)]
Oroantral Fistula	D009957	[A fistula between the maxillary sinus and the oral cavity.]
Orofaciodigital Syndromes	D009958	[Two syndromes of oral, facial, and digital malformations. Type I (Papillon-Leage and Psaume syndrome, Gorlin-Psaume syndrome) is inherited as an X-linked dominant trait and is found only in females and XXY males. Type II (Mohr syndrome) is inherited as an autosomal recessive trait.]
Oropharyngeal Neoplasms	D009959	[Tumors or cancer of the OROPHARYNX.]
Orthomyxoviridae Infections	D009976	[Virus diseases caused by the ORTHOMYXOVIRIDAE.]
Orthostatic Intolerance	D054971	[Symptoms of cerebral hypoperfusion or autonomic overaction which develop while the subject is standing, but are relieved on recumbency. Types of this include NEUROCARDIOGENIC SYNCOPE; POSTURAL ORTHOSTATIC TACHYCARDIA SYNDROME; and neurogenic ORTHOSTATIC HYPOTENSION. (From Noseworthy, JH., Neurological Therapeutics Principles and Practice, 2007, p2575-2576)]
Ossification of Posterior Longitudinal Ligament	D017887	[A calcification of the posterior longitudinal ligament of the spinal column, usually at the level of the cervical spine. It is often associated with anterior ankylosing hyperostosis.]
Ossification, Heterotopic	D009999	[The development of bony substance in normally soft structures.]
Osteitis	D010000	[Inflammation of the bone.]
Osteitis Deformans	D010001	[A disease marked by repeated episodes of increased bone resorption followed by excessive attempts at repair, resulting in weakened, deformed bones of increased mass. The resultant architecture of the bone assumes a mosaic pattern in which the fibers take on a haphazard pattern instead of the normal parallel symmetry.]