Pterygium inversum unguis is an infrequent disorder, where an exaggerated stratum corneum in the distal nail bed or
hyponychium leads to obliteration of the distal groove.
As the fungal infection progresses from the plantar and palmar skin to the
hyponychium of the nail unit, the nail plate remains intact and uninvaded.[1,8] The fungus produces an inflammatory reaction, resulting in hyperkeratosis and focal parakeratosis, ie, retained nuclei in the stratum corneum.
He reviewed his institution's experience with treating 29 cases of NAMis with en bloc excision: removal of nail folds, matrix, bed,
hyponychium, and margins.
The parts include the eponychium, paronychium,
hyponychium, lunula, matrix, and dorsal skin fold (Fig.
Pits, ridges and grooves are a result of psoriasis of the nail matrix, whereas onycholysis, subungual hyperkeratosis and splinter hemorrhages are attributable to disease of the nail bed or
hyponychium. Circular areas of discoloration of the nail bed and
hyponychium may resemble an 'oil drop' below the nail.
For large lesions located in the lateral third of the nail, she added, "a longitudinal nail biopsy yields the best information because it samples the nail matrix, nail bed, nail fold, and
hyponychium."
Another common but often-overlooked foot variation causes a shiny dermatosis at the
hyponychium and onycholysis with hyperkeratosis on the great toenail.
The lacquer was painted once daily on the entire nail plate of the target nail(s), along with approximately 5 mm of adjacent skin, the
hyponychium, and the accessible ventral surface of the nail plate.
Another common but often-over-looked foot variation causes a shiny dermatosis at the
hyponychium and onycholysis with hyperkeratosis on the great toenail.
This is the periungual extension of pigmentation on the proximal or lateral nail fold or the
hyponychium.
Application instructions specify that the medication must completely cover the toenail folds and bed, the
hyponychium, and the undersurface of the nail plate.
This is the periungual extension of pigmentation present on the proximal or lateral nail fold or the
hyponychium.
