hyaline area

hyaline area

An obsolete term for a focal area of cartilaginous matrix that surrounds cell nests between the elastic and white fibrocartilage.
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Cells solitary, free floating, linear or linear- lanceolate, with round, protracted capitate ends; striae parallel, radiate crossed by hyaline area; chromatophores two, pyrenoids two in each.
19-21), in lateral view, curved dorsally from base, with broadest point on apical third; dorsal hyaline area medial; dorsal prominence present but inconspicuous; dense teeth mostly subtriangular, not bearing denticles, positioned behind dorsal hyaline area; apex subacute.
3 Wing with large hyaline area from central section of cell rl, just beyond pterostigma, extending to crossvein r-m and to, or almost to, crossvein dm-cu (at least half distance across cell [r.sub.4+5]) (Fig.
--Wing with hyaline area not extending posteriorly beyond vein [R.sub.4+5] to these crossveins (Fig.
7) described and illustrated by Munro (1935), including broad blackish band extending from posterobasal edge of anal lobe to wing tip, over most of posterior half of wing, reaching vein [R.sub.4+5] only in cell br, and interrupted by hyaline area in posterior half of cell [cu.sub.1] and apex of anal lobe.
Wing (Figs 8, 10): Pattern: Different from male pattern both in general look and in distribution of hues: general pattern comprises more-or-less discrete dark longitudinal band extending along entire wing, from posterobasal part to apex, considerably widened in distal half, first posteriorly, then anteriorly, virtually filling entire wing surface beyond level of crossvein dm-cu; this dark area usually extends anteriorly clearly to, or almost to, vein [R.sub.4+5] and is bordered by faintly reticulate or hyaline areas, except distal to level of crossvein dm-cu.
Microscopic features of pleomorphic adenoma: Wellencapsulated tumour tissue with heterogenous stromal elements consisting of chondromyxoid, fibrous and hyaline areas, and ducts and ductules of varying sizes lined by luminal cuboidal epithelial cells and outer layer epithelial cell.
Both changes can show eosinophilic hyaline areas that mimic amyloid in routine studies.