Pterygium unguis explained

Pterygium unguis
Synonyms:	Dorsal pterygium
Specialty:	Dermatology
Causes:	Lichen planus

Pterygium unguis (or dorsal pterygium^[1]) 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.^[2]

See also

• Pterygium inversum unguis
• List of cutaneous conditions

Further reading

• Grover . Chander . Singal . Archana . Bhattacharya . Sambit Nath . Pterygium Complicating Nail Psoriasis and Trachyonychia: Is It Rare? . Skin Appendage Disorders . S. Karger AG . 7 . 4 . 2021 . 2296-9195 . 10.1159/000513455 . 298–305 . 34307478 . 8280421 . none.
• Wechsuruk . Panrudee . Bunyaratavej . Sumanas . Kiratiwongwan . Rungsima . Suphatsathienkul . Pranittra . Wongdama . Supisara . Leeyaphan . Charussri . Clinical features and treatment outcomes of nail lichen planus: A retrospective study . JAAD Case Reports . Elsevier BV . 17 . 2021 . 2352-5126 . 10.1016/j.jdcr.2021.09.015 . 43–48 . none. 8526913 .

Notes and References

1. Freedberg, et al. (2003). Fitzpatrick's Dermatology in General Medicine. (6th ed.). McGraw-Hill. .
2. James, William; Berger, Timothy; Elston, Dirk (2005). Andrews' Diseases of the Skin: Clinical Dermatology. (10th ed.). Saunders. .