| AFP | alpha-fetoprotein; anterior faucial pillar; atypical facial pain |
|---|---|
| ALEP | atypical lymphoepithelioid cell proliferation |
| ALLO | atypical Legionella-like organism |
| ATL | Achilles tendon lengthening; acute T-cell leukemia; adult T-cell leukemia; anterior tricuspid leafle... |
| atyp | atypical |
| atypical melanocytic hyperplasia | Proliferation of melanocytes showing nuclear atypicality, especially as scattered single cells high in the epidermis; interpreted by some pathologists as malignant melanoma in situ. (05 Mar 2000) |
|---|---|
| atypical mycobacteria | Species of mycobacteria other than M. Tuberculosis or M. Bovis that can cause disease in immunocompromised humans. (05 Mar 2000) |
| atypical mycobacterial infection | <microbiology> Infection with organisms from the Mycobacterium genus other than tuberculosis. Risk factors include immunocompromised patients and those with AIDS. Mycobacterium avium intracellulare is an example which frequently infects AIDS patients. Atypical mycobacterial infections can cause abscesses, septic arthritis and osteomyelitis. Treatment can be difficult due to the emergence of resistance to standard antitubercular antibiotics. (27 Sep 1997) |
| atypical nevi | <dermatology> Moles whose appearance is different than normal moles. They may be larger and have irregular borders. Their colour may not be uniform and they may be flat or raised above the skin surface. Any mole that appears irregular may be suspect for skin cancer. (16 Dec 1997) |
| atypical pneumonia | <chest medicine> This refers to a type of pneumonia that does not follow the typical signs and symptoms of pneumonia. A number of different viral and bacterial agents have been identified which can cause this form of respiratory infection. Examples include Chlamydia pneumonia, psittacosis, Mycoplasma, influenza A or B, adenovirus and Legionella. Antibiotics will be necessary in all but the mildest cases. Symptoms generally improve in less than 2 weeks. (27 Sep 1997) |
| atypical pseudocholinesterase | A genetic variant of cholinesterase that fails to catalyze the hydrolysis of succinylcholine. See: dibucaine number, fluoride number. (05 Mar 2000) |
| atypical trigeminal neuralgia | Periodic pain in any region of the face, teeth, tongue, and occasionally in the occipital or shoulder area, which lasts several minutes to several days but has no trigger point and lacks the paroxysmal character of tic douloureux. Synonym: atypical facial neuralgia. (05 Mar 2000) |
| atypical verrucous endocarditis | Verrucous endocarditis sometimes associated with disseminated lupus erythematosus. Synonym: atypical verrucous endocarditis, Libman-Sacks syndrome, nonbacterial verrucous endocarditis. (05 Mar 2000) |
| regressing atypical histiocytosis | A rare disease characterised clinically by multiple ulcerating cutaneous papules and nodules which show spontaneous regression; the skin is infiltrated by malignant-appearing histiocytes. (05 Mar 2000) |
| pneumonia, atypical interstitial, of cattle | A cattle disease of uncertain cause, probably an allergic reaction. (12 Dec 1998) |
| mycobacterium, atypical | So-called atypical species of the genus mycobacterium. They are also called tuberculoid bacilli, i.e.: m. Buruli (see m. Ulcerans), m. Chelonae, m. Duvalii, m. Flavescens, m. Fortuitum, m. Gilvum, m. Gordonae, m. Intracellulare (see mycobacterium avium complex), m. Kansasii (kansas), m. Marinum, m. Obuense, m. Scrofulaceum, m. Szulgai, m. Terrae, m. Ulcerans, m. Xenopi. (12 Dec 1998) |
| mycobacterium infections, atypical | Infections with so called atypical mycobacteria (tuberculoid bacilli): m. Kansasii (kansas), m. Marinum, m. Scrofulaceum, m. Flavescens, m. Gordonae, m. Obuense, m. Gilvum, m. Duvali, m. Szulgai, m. Intracellulare (see mycobacterium avium complex), m. Xenopi (littorale), m. Ulcerans, m. Buruli, m. Terrae, m. Fortuitum (minetti, giae), m. Chelonae. (12 Dec 1998) |
| primary atypical pneumonia | An acute systemic disease with involvement of the lungs, caused by Mycoplasma pneumoniae and marked by high fever, cough, relatively few physical signs, and scattered densities on X-rays; usually associated with development of cold agglutinins and antibodies to the bacteria. Synonym: atypical pneumonia, Eaton agent pneumonia, mycoplasmal pneumonia. (05 Mar 2000) |
| acute bacterial endocarditis | A type of bacterial endocarditis caused by pyogenic organisms such as haemolytic streptococci or staphylococci. (05 Mar 2000) |
| adhesins, bacterial | Cell-surface components or appendages of bacteria that facilitate adhesion (bacterial adhesion) to other cells or to inanimate surfaces. most fimbriae (fimbriae, bacterial) of gram-negative bacteria function as adhesins, but in many cases it is a minor subunit protein at the tip of the fimbriae that is the actual adhesin. In gram-positive bacteria, a protein or polysaccharide surface layer serves as the specific adhesin. (12 Dec 1998) |