pterygium formation

pterygium formation

replacement of central nail matrix area with fibrous tissue, causing longitudinal thinning/dystrophy of central nail plate; severe cases show longitudinal loss of central nail plate; characteristic of lichen planus
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1) Although a hereditary influence on pterygium formation is recognised1 and a report of possible genetic influence in white South Africans has been published, (2) little is known about these factors in black African populations.
Pterygium formation is distinctive in lichen planus (Figure 3).
Kwok LS, Coroneo MT: A model for pterygium formation.