Pterygium unguis
Encyclopedia
Pterygium unguis forms as a result of scarring between the proximal nailfold and matrix, with the classic example being lichen planus
, though it has been reported to occur as a result of sarcoidosis
and Hansen's disease.
Lichen planus
Lichen planus is a chronic mucocutaneous disease that affects the skin, tongue, and oral mucosa. The disease presents itself in the form of papules, lesions, or rashes. Lichen planus does not involve lichens, the fungus/algae symbionts that often grow on tree trunks; the name refers to the dry and...
, though it has been reported to occur as a result of sarcoidosis
Sarcoidosis
Sarcoidosis , also called sarcoid, Besnier-Boeck disease or Besnier-Boeck-Schaumann disease, is a disease in which abnormal collections of chronic inflammatory cells form as nodules in multiple organs. The cause of sarcoidosis is unknown...
and Hansen's disease.
See also
- Pterygium inversum unguisPterygium inversum unguisPterygium inversum unguis is characterized by the adherence of the distal portion of the nailbed to the ventral surface of the nail plate...
- Nail anatomyNail (anatomy)A nail is a horn-like envelope covering the dorsal aspect of the terminal phalanges of fingers and toes in humans, most non-human primates, and a few other mammals. Nails are similar to claws, which are found on numerous other animals....
- List of cutaneous conditions