| MHA | major histocompatibility antigen; May-Hegglin anomaly; Mental Health Association; methemalbumin; mic... |
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| MPA | mean pulmonary arterial [pressure]; medial preoptic area; Medical Procurement Agency; medroxyprogest... |
| NSA | Neurological Society of America; normal serum albumin; no salt added; no significant abnormality; no... |
| PBA | polyclonal B-cell activity; pressure breathing assist; prolactin-binding assay; prune belly anomaly;... |
| SCA | self-care agency; severe congenital anomaly; sickle-cell anemia; single-camera autostereoscopic [ima... |
| ebstein anomaly | <radiology> Tricuspid valve: abnormal formation and insertion, usually tricuspid insufficiency, right atrial enlargement (if severe, box-like heart), decreased pulmonary vascularity, cyanosis, severe at birth, mild in later childhood, angio: to-and-fro motion of contrast between RA and atrialised RV (12 Dec 1998) |
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| ebstein's anomaly | Congenital downward displacement of the tricuspid valve with the septal and posterior leaflets being attached to the wall of the right ventricle. (12 Dec 1998) |
| eugnathic anomaly | An abnormality that is limited to the teeth and their immediate alveolar supports. Synonym: eugnathic anomaly. Origin: eu-+ G. Gnathos, jaw (05 Mar 2000) |
| Uhl anomaly | Right ventricular myocardial aplasia, causing a dilated, thin-walled right ventricle without murmurs; death results in early childhood. (05 Mar 2000) |
| Freund's anomaly | A narrowing of the upper aperture of the thorax by shortening of the first rib and its cartilage; formerly believed to predispose to tuberculosis because of defective expansion of the lung apex. (05 Mar 2000) |