| RO | radiation oncology; radiation output; ratio of; relative odds; renal osteodystrophy; reverse osmosis... |
|---|---|
| RP | radial pulse; radiopharmaceutical; rapid processing [of film]; Raynaud phenomenon; reactive protein;... |
| RP-HPLC | reverse phase-high performance liquid chromatography |
| RPIPP | reverse phase ion-pair partition |
| RPLC | reverse phase liquid chromatography |
| mosaic pattern | On high-resolution CT scans of the lungs, a pattern of brighter and darker regions corresponding to differences in perfusion or aeration; found in some cases of chronic thromboembolism or of bronchiolitis obliterans. Compare: oligaemia. (05 Mar 2000) |
|---|---|
| honeycomb pattern | Dense, slightly irregular circular shadows, most common next to the pleura at the lung base, on chest radiographs or CT; caused by chronic interstitial fibrosis of diverse causes. (05 Mar 2000) |
| hourglass pattern | A vigorous ringlike contraction observed angiographically in the left ventricular angiogram in the right anterior oblique projection, resembling an hourglass; it is seen in the prolapsed mitral valve leaflet syndrome. (05 Mar 2000) |
| interstitial pattern | One of several chest radiographic patterns associated with interstitial infiltration or thickening, including honeycomb pattern, miliary pattern, reticulonodular pattern, or septal lines. (05 Mar 2000) |
| occlusal pattern | The form of the occlusal surface of a tooth or a row of teeth. Synonym: occlusal pattern. (05 Mar 2000) |
| three-dimensional diffraction pattern | <optics> The diffraction pattern (of a point source) that appears in the three-dimensional space in and near the focal plane. For an aberration-free, diffraction- limited system, the slice of the diffraction pattern in the focal plane is the Airy disk and its surrounding diffraction rings. Above and below focus, the pattern changes periodically along the axis of the light beam so that bright and dark Airy-disk-like patterns appear alternately. The axial period of repeat is spaced twice as far apart as the radial period of repeat in the Airy disk and its diffraction rings (05 Aug 1998) |
| Electron Channeling Pattern | <microscopy> A pattern formed by the periodic backscattering of electrons by the specimen lattice in a transmission electron microscope. Allows determination of crystal structure and lattice parameters in crystals greater than 10 micrometres diameter. Acronym: ECP (05 Aug 1998) |
| juvenile pattern | A precordial T-wave inversion, sometimes with J-ST elevations in an electrocardiogram, resembling that seen in normal children, which occurs as a normal variant in some adults, especially blacks, and especially in leads V1, V2, and V3. (05 Mar 2000) |
| female pattern alopecia | Diffuse partial hair loss in the centroparietal area of the scalp, with preservation of the frontal and temporal hair lines; the most frequent type of androgenic alopecia in women. (05 Mar 2000) |
| female pattern baldness | <dermatology> Hair loss in women that may be associated with aging, hormones (androgens) or genetic predisposition. The pattern of baldness in women is different from that of men. In women there is thinning of the hair all over the scalp, but the frontal hairline is maintained. The hair loss is usually permanent. Treatment has been successful with topical minoxidil in some cases. (27 Sep 1997) |
| ambulant oedema | Oedema forming during periods of walking with the legs dependent. (05 Mar 2000) |
| angioneurotic oedema | <neurology> An acute or recurring attack of transient oedema suddenly appearing in areas of the skin or mucous membranes and occasionally of the viscera, often associated with dermatographism, urticaria, erythema, and purpura. It can produce dramatic swelling of the subcutaneous tissues (welts beneath the skin) that typically appears around the eyes and lips. Welts may also involve the hands, feet and throat (compromise the airway). This condition is associated with allergies (for example foods, pollen), but may also be a side effect of some medications (for example ACE inhibitors, salicylates). Emotional stress, exposure to cold, water, sunlight, heat and insect bites all have been know to cause angioneurotic oedema. Treatment is with adrenaline, antihistamines, cimetidine, and/or corticosteroids. (12 Dec 1998) |
| angioneurotic oedema, hereditary | A genetic form of angioedema. (Angioedema is also referred to as Quinke's disease.) Persons with it are born lacking an inhibitor protein (called C1 esterase inhibitor) that normally prevents activation of a cascade of proteins leading to the swelling of angioedema. Patients can develop recurrent attacks of swollen tissues, pain in the abdomen, and swelling of the voice box (larynx) which can compromise breathing. The diagnosis is suspected with a history of recurrent angioedema. It is confirmed by finding abnormally low levels of C1 esterase inhibitor in the blood. Treatment options include antihistamines and male steroids (androgens) that can also prevent the recurrent attacks. Also called hereditary angioedema. (12 Dec 1998) |
| Berlin's oedema | Retinal oedema after blunt trauma to the globe. (05 Mar 2000) |
| blue oedema | The swelling and cyanosis of an extremity in hysterical paralysis. (05 Mar 2000) |