| pars pigmentosa | pars pigmentosa |
|---|---|
| retinitis pigmentosa | <ophthalmology> Disease caused by overactivity of the pigmented retinal epithelial cells, leading to damage and occlusion of photoreceptors and blindness. (18 Nov 1997) |
| morphea pigmentosa | Localised scleroderma in which there is an increase in pigmentation. (05 Mar 2000) |
| pseudoretinitis pigmentosa | A widespread pigmentary mottling of the retina that may follow severe eye trauma, especially from a penetrating injury. (05 Mar 2000) |
| dermatopathia pigmentosa reticularis | A persistent purplish network-patterned discoloration of the skin caused by dilation of capillaries and venules due to stasis or changes in underlying blood vessels including hyalinization; rarely appears as a developmental defect. Synonym: angiitis livedo reticularis, dermatopathia pigmentosa reticularis, livedo racemosa. (05 Mar 2000) |
| urticaria pigmentosa | The most common form of mastocytosis. It occurs primarily in children and is typically characterised by multiple persistent small, reddish-brown, hyperpigmented, pruritic macules and papules. They are located most commonly on the trunk, but seen also on the extremities, head, and neck. (12 Dec 1998) |
| zona | Origin: L, a girdle. See Zone. A zone or band; a layer. Zona pellucida. [NL. <biology> A radiately striated membrane situated next the yolk of an ovum, or separated from it by a very delicate membrane only. Source: Websters Dictionary (01 Mar 1998) |
| zona arcuata | The inner third of the basilar membrane of the cochlear duct extending from the tympanic lip of the osseous spiral lamina to the outer pillar cell of the spiral organ (of Corti). Synonym: zona arcuata, zona tecta. (05 Mar 2000) |
| zona ciliaris | The outer, wider zone of the anterior surface of the iris, separated from the pupillary zone by the collarette. Synonym: zona ciliaris. (05 Mar 2000) |
| zona corona | An irregularly disposed collection of visible veins seen in the skin of people usually of or past middle age; it has no specific connection with any deep structure, such as the diaphragm, and no necessary connection with underlying visceral disease. Synonym: zona corona. (05 Mar 2000) |
| zona dermatica | A ridge of thickened skin surrounding the protrusion in spina bifida. (05 Mar 2000) |
| zona epithelioserosa | The membranous ring, within the zona dermatica, surrounding the protrusion in spina bifida. (05 Mar 2000) |
| zona facialis | Herpes zoster involving the face. (05 Mar 2000) |
| zona fasciculata | The wide middle zone of the adrenal cortex. This zone consists of large lipid-laden cells radially arranged in parallel cords. It converts pregnenolone to cortisol by a series of enzymatically regulated steps. A small amount of corticosterone is formed as a by-product of cortisol synthesis. (12 Dec 1998) |
| zona glomerulosa | The narrow subcapsular outer zone of the adrenal cortex. This zone consists of granular cells which stain deeply and are arranged in rounded groups. It converts pregnenolone to aldosterone by a series of enzymatically regulated steps. (12 Dec 1998) |