Pterygium Unguis
Pterygium unguis (also known as "Dorsal pterygium":660) 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.
See also
- Pterygium inversum unguis
- Nail anatomy
- List of cutaneous conditions