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The presence of methemoglobin in the blood, resulting in cyanosis. A small amount of methemoglobin is present in the blood normally, but injury or to…

Aneurysm of the MICROVASCULATURE. Charcot–Bouchard aneurysms are aneurysms of the brain vasculature which is a common cause of CEREBRAL HEMORRHAGE. R…

Infections with FUNGI of the phylum MICROSPORIDIA.

ANGINA PECTORIS or angina-like chest pain with a normal coronary arteriogram and positive EXERCISE TEST. The cause of the syndrome is unknown. While …

The reduction in density of the MICROVASCULATURE.

Atelectasis of the right middle pulmonary lobe, with chronic pneumonitis. (Dorland, 27th ed)

Allergic reaction to milk (usually cow's milk) or milk products. MILK HYPERSENSITIVITY should be differentiated from LACTOSE INTOLERANCE, an intolera…

A highly contagious parvovirus infection in mink, caused by MINK ENTERITIS VIRUS or the closely related FELINE PANLEUKOPENIA VIRUS or CANINE PARVOVIR…

Myocardial infarction in the absence of obstructive coronary artery disease. CORONARY CIRCULATION disruption is due to various other factors such as …

Complication of CHOLELITHIASIS characterized by OBSTRUCTIVE JAUNDICE; abdominal pain, and fever.

Infestations with arthropods of the subclass ACARI, superorder Acariformes.

Diseases caused by abnormal function of the MITOCHONDRIA. They may be caused by mutations, acquired or inherited, in mitochondrial DNA or in nuclear …

A heterogenous group of disorders characterized by alterations of mitochondrial metabolism that result in muscle and nervous system dysfunction. Thes…

A group of muscle diseases associated with abnormal mitochondria function.

Backflow of blood from the LEFT VENTRICLE into the LEFT ATRIUM due to imperfect closure of the MITRAL VALVE. This can lead to mitral valve regurgitat…

Abnormal protrusion or billowing of one or both of the leaflets of MITRAL VALVE into the LEFT ATRIUM during SYSTOLE. This allows the backflow of bloo…

Narrowing of the passage through the MITRAL VALVE due to FIBROSIS, and CALCINOSIS in the leaflets and chordal areas. This elevates the left atrial pr…

A syndrome with overlapping clinical features of systemic lupus erythematosus, scleroderma, polymyositis, and Raynaud's phenomenon. The disease is di…

A common, benign, usually self-limited viral infection of the skin and occasionally the conjunctivae by a poxvirus (MOLLUSCUM CONTAGIOSUM VIRUS). (Do…

Thickening and loss of elasticity of the walls of muscular ARTERIES due to calcification of the TUNICA MEDIA, the concentric layers of helically arra…

Infection of ruminants with tapeworms of the genus Moniezia.

Conditions characterized by the presence of M protein (Monoclonal protein) in serum or urine without clinical manifestations of plasma cell dyscrasia.

Infections with viruses of the order MONONEGAVIRALES. The concept includes FILOVIRIDAE INFECTIONS; PARAMYXOVIRIDAE INFECTIONS; and RHABDOVIRIDAE INFE…

Infections with bacteria of the family MORAXELLACEAE.

Infections with viruses of the genus MORBILLIVIRUS, family PARAMYXOVIRIDAE. Infections mainly cause acute disease in their hosts, although in some ca…

Infectious diseases transmitted by mosquito vectors. Mosquito-borne human viral diseases include Chikungunya, Dengue, viral encephalitis (e.g., Japan…

Abnormal breathing through the mouth, usually associated with obstructive disorders of the nasal passages.

A viral disease infecting PRIMATES and RODENTS. Its clinical presentation in humans is similar to SMALLPOX including FEVER; HEADACHE; COUGH; and a pa…

An acute, febrile, mucocutaneous condition accompanied by swelling of cervical lymph nodes in infants and young children. The principal symptoms are …

A group of inherited metabolic diseases characterized by the accumulation of excessive amounts of acid mucopolysaccharides, sphingolipids, and/or gly…