{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T21:47:00Z","timestamp":1791323220138,"version":"4.3.1"},"reference-count":10,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2014,8,4]],"date-time":"2014-08-04T00:00:00Z","timestamp":1407110400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Acad Dermatol Venereol"],"published-print":{"date-parts":[[2015,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Pterygium Inversum Unguis (<jats:styled-content style=\"fixed-case\">PIU<\/jats:styled-content>) is a wing\u2010like extended hyponychium associated with the absence of the distal groove. Although a rare condition, it has been described with different names, confusing both the investigator and the reader.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p>We propose a new nomenclature based on tissue origin and pathology, to account for these conditions. 1) Congenital Aberrant Hyponychium 2) Acquired Pterygium Inversum Unguis 3) Acquired Reversible Extended Hyponychium.<\/jats:p><\/jats:sec><jats:sec><jats:title>Main Observations<\/jats:title><jats:p>We report a case of a 19\u2010year\u2010old male, with epidermal pigmentation abnormalities, who had painful fingertips of both index fingers and thumbs since he was 13. He therefore let his finger nails grow very long, minimizing painful contact with the hyponychium. Removal of the aberrant hyponychium revealed glomus bodies aggregates with increased nerve fibers. Subsequently after excision of the hyponychium, his pain was resolved.<\/jats:p><\/jats:sec><jats:sec><jats:title>Summary<\/jats:title><jats:p>Congenital, transient or permanent changes in the hyponychium should be named and classified according to tissue origin to avoid nomenclature confusion.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jdv.12632","type":"journal-article","created":{"date-parts":[[2014,8,4]],"date-time":"2014-08-04T04:18:09Z","timestamp":1407125889000},"page":"1427-1431","source":"Crossref","is-referenced-by-count":9,"title":["HYPONYCHIUM ABNORMALITIES Congenital Aberrant Hyponychium vs. Acquired Pterygium Inversum Unguis vs. Acquired Reversible Extended Hyponychium: a proposed classification based on origin, pathology and outcome"],"prefix":"10.1111","volume":"29","author":[{"given":"N.","family":"Zaias","sequence":"first","affiliation":[{"name":"Dermatology Mt. Sinai Medical Center Miami Beach FL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.X.","family":"Escovar","sequence":"additional","affiliation":[{"name":"Dermatology Mt. Sinai Medical Center Miami Beach FL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.N.","family":"Zaiac","sequence":"additional","affiliation":[{"name":"Herbert Wertheim College of Medicine Florida International University Miami FL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"E.","family":"Del Rio","sequence":"additional","affiliation":[{"name":"Dermatology Mt. Sinai Medical Center Miami Beach FL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"N.","family":"Dou","sequence":"additional","affiliation":[{"name":"Dermatology Mt. Sinai Medical Center Miami Beach FL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C.","family":"Ricotti","sequence":"additional","affiliation":[{"name":"Aurora Diagnostic Miami Lakes FL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L.","family":"Karai","sequence":"additional","affiliation":[{"name":"Aurora Diagnostic Miami Lakes FL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"Florez\u2010White","sequence":"additional","affiliation":[{"name":"Herbert Wertheim College of Medicine Florida International University Miami FL USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2014,8,4]]},"reference":[{"key":"e_1_2_4_2_1","doi-asserted-by":"crossref","first-page":"817","DOI":"10.1001\/archderm.1973.01620270039009","article-title":"Pterygium inversum unguis","volume":"108","author":"Caputo R","year":"1973","journal-title":"Arch of Dermatol"},{"key":"e_1_2_4_3_1","doi-asserted-by":"crossref","first-page":"1307","DOI":"10.1001\/archderm.1993.01680310077013","article-title":"Pterygium inversum unguis. Report of 19 cases and review of the literature","volume":"129","author":"Caputo R","year":"1993","journal-title":"Arch of Dermatol"},{"key":"e_1_2_4_4_1","doi-asserted-by":"crossref","first-page":"89","DOI":"10.1001\/archderm.1974.01630070057013","article-title":"Congenital. Painful aberrant hyponychium","volume":"110","author":"Odom RB","year":"1974","journal-title":"Arch of Dermatol"},{"key":"e_1_2_4_5_1","doi-asserted-by":"publisher","DOI":"10.1001\/archderm.1963.01590130043010"},{"key":"e_1_2_4_6_1","doi-asserted-by":"crossref","first-page":"1429","DOI":"10.1001\/archderm.1977.01640100107021","article-title":"Pterygium inversum unguis\u2010like changes in scleroderma. Report of four cases","volume":"113","author":"Patterson JW","year":"1977","journal-title":"Arch Dermatol"},{"key":"e_1_2_4_7_1","doi-asserted-by":"crossref","first-page":"110","DOI":"10.1001\/archderm.1990.01670320134035","article-title":"Pterygium inversum unguis in a patient with leprosy","volume":"126","author":"Patki AH","year":"1990","journal-title":"Arch Dermatol"},{"key":"e_1_2_4_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jaad.2005.04.057"},{"key":"e_1_2_4_9_1","doi-asserted-by":"publisher","DOI":"10.1159\/000246292"},{"key":"e_1_2_4_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0536.1986.tb01358.x"},{"key":"e_1_2_4_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jaad.2006.05.040"}],"container-title":["Journal of the European Academy of Dermatology and Venereology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fjdv.12632","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fjdv.12632","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/jdv.12632","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,9,24]],"date-time":"2023-09-24T12:35:52Z","timestamp":1695558952000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/jdv.12632"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014,8,4]]},"references-count":10,"journal-issue":{"issue":"7","published-print":{"date-parts":[[2015,7]]}},"alternative-id":["10.1111\/jdv.12632"],"URL":"https:\/\/doi.org\/10.1111\/jdv.12632","archive":["Portico"],"relation":{},"ISSN":["0926-9959","1468-3083"],"issn-type":[{"value":"0926-9959","type":"print"},{"value":"1468-3083","type":"electronic"}],"subject":[],"published":{"date-parts":[[2014,8,4]]}}}