- 1. A design; often refers to chest radiographic findings. 2. In dentistry, a form used in making a mold, as for an inlay or partial denture framework.- airway p. chest radiographic appearance of thickened bronchial walls, bronchiectasis, bronchiolitis, or acinar consolidation.- alveolar p. cloudy to dense opacities, obscuring vascular markings, on chest radiographs. SYN: airspace-filling p..- ballerina-foot p. a vigorous posteromedial contraction of the left ventricle coupled with convexity anteriorly sometimes resulting from poor contraction of the opposing anterior wall; it is the most frequent dyssynergy observed in the prolapsed mitral valve leaflet syndrome (even with a normal anterior wall) and produces a configuration of angiographic dye in the right anterior oblique projection resembling a ballerina's foot; sometimes called dancer's foot malformation.- butterfly p. bilateral, symmetric, pulmonary alveolar opacities sparing the periphery, on chest radiographs; usually caused by pulmonary edema.- ground-glass p. radiographic or CT appearance of hazy opacity that fails to obscure pulmonary vascular markings.- honeycomb p. 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.- hourglass p. 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.- interstitial p. one of several chest radiographic patterns associated with interstitial infiltration or thickening, including honeycomb p., miliary p., reticulonodular p., or septal lines.- juvenile p. 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 black persons, and especially in leads V1, V2, and V3.- miliary p. a chest radiographic p. of fine, rounded opacities, typical of hematogenous dissemination of tuberculosis; size has some relationship to that of a millet seed.- mosaic p. on high-resolution CT scans of the lungs, a p. of brighter and darker regions corresponding to differences in perfusion or aeration; found in some cases of chronic thromboembolism or of bronchiolitis obliterans. Cf.:oligemia.- reticulonodular p. (re-tik′u-lo-nod′u-lar) a somewhat netlike chest radiographic p., with nodular thickening at the intersections of the lines; a nonspecific interstitial p..- wax p. a p. of wax that, when invested and burned out or otherwise eliminated, will produce a mold in which a casting may be made. SYN: wax form.
* * *pat·tern 'pat-ərn n1) a model for making a mold used to form a casting2) a reliable sample of traits, acts, tendencies, or other observable characteristics of a person, group, or institution <\patterns of behavior>3) an established mode of behavior or cluster of mental attitudes, beliefs, and values that are held in common by members of a group
* * *pat·tern (patґərn) 1. a design to be followed or a device to be used in the construction or fabrication of something. 2. the particular design or arrangement of figures. 3. a characteristic set of traits or actions, as behavior patterns.
Medical dictionary. 2011.