| Parafilaria multipapillosa | A common filarial parasite that causes dermatorrhagia parasitica. (05 Mar 2000) |
|---|---|
| paraflagella | Plural of paraflagellum. (05 Mar 2000) |
| paraflagellate | 1. Having one or more paraflagella. Synonym: paramastigote. (05 Mar 2000) |
| paraflagellum | A minute accessory flagellum sometimes present in addition to the ordinary flagellum of certain protozoans. (05 Mar 2000) |
| parafollicular | Associated spatially with a follicle. (05 Mar 2000) |
| parafollicular cells | Cell's present between follicles or interspersed among follicular cell's; they are rich in mitochondria and are believed to be the source of thyrocalcitonin. Synonym: C cell, light cells of thyroid. (05 Mar 2000) |
| paraformaldehyde | A polymer of formaldehyde, used as a disinfectant. Synonym: trioxymethylene. (05 Mar 2000) |
| parafrenal abscess | An abscess that occurs on either side of the frenum of the penis. (05 Mar 2000) |
| parafuchsin | A tri(aminophenyl)methane hydrochloride;an important red biologic stain used in Schiff's reagent to detect cellular DNA (Feulgen stain), mucopolysaccharides (PAS stain), and proteins (ninhydrin-Schiff stain). Synonym: parafuchsin. (05 Mar 2000) |
| paragammacism | Substitution of another letter sound for the g sound. See: gammacism. Origin: para-+ G. Gamma, the letter g (05 Mar 2000) |
| paraganglia | Plural of paraganglion. (05 Mar 2000) |
| paraganglia, chromaffin | Small bodies containing chromaffin cells occurring outside of the adrenal medulla, most commonly near the sympathetic ganglia and in organs such as the kidney, liver, heart and gonads. (12 Dec 1998) |
| paraganglia, nonchromaffin | Several clusters of chemoreceptive and supporting cells associated with blood vessels and nerves (especially the glossopharyngeal and vagus). The nonchromaffin paraganglia sense pH, carbon dioxide, and oxygen concentrations in the blood and participate in respiratory, and perhaps circulatory, control. They include the carotid and aortic bodies, the glomus jugulare, and the glomus tympanicum. (12 Dec 1998) |
| paraganglioma | <radiology> (glomus tumour) chemodectoma, arise from extra-adrenal portions of paraganglion system, females more than males, 5% most likely to be multiple, associated with branchial arch mesodermal derivatives, sites: carotid bifurcation (glomus jugulare), middle ear (glomus tympanicum), along vagus nerve (glomus vagale), also: larynx, orbit, nose, aortic arch (12 Dec 1998) |
| paraganglioma, extra-adrenal | A relatively rare, usually benign neoplasm originating in the chemoreceptor tissue of the carotid body, glomus jugulare, and aortic bodies. It consists histologically of rounded or ovoid hyperchromatic cells that tend to be grouped in an alveolus-like pattern within a scant to moderate amount of fibrous stroma and a few large thin-walled vascular channels. They are uncommon before the age of 20, with a female predominance in some series. (12 Dec 1998) |