{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T20:02:01Z","timestamp":1789588921249,"version":"build-2803163510"},"reference-count":9,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"1","license":[{"start":{"date-parts":[[2025,1,1]],"date-time":"2025-01-01T00:00:00Z","timestamp":1735689600000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-sa\/4.0"}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2025,1]]},"abstract":"ABSTRACT<\/jats:title>\n \n Background:<\/jats:title>\n The frequencies of the different types of alopecia in hair referral centres have so far been reported in a single multicentre study at multiple specialist hair clinics over a time period of one month.<\/jats:p>\n <\/jats:sec>\n \n Aim:<\/jats:title>\n Single center studies over a longer time-frame offer a more representative and homogeneous study population with regard to ethnic, demographic, and climatic factors, and seasonality of hair growth and shedding than multicenter studies over a short time frame.<\/jats:p>\n <\/jats:sec>\n \n Materials and Methods:<\/jats:title>\n Retrospective study of patient data at a single centre over 10 years.<\/jats:p>\n <\/jats:sec>\n \n Results:<\/jats:title>\n A total of 15\u2019211 patients (73% female, 27% male) were included, and we found the following frequencies: pattern hair loss (67%), alopecia areata (11%), the cicatricial alopecias (11%), and telogen effluvium (7%). Among the cicatricial alopecias, the most frequent diagnosis was frontal fibrosing alopecia (33% of cicatricial alopecias), followed in order of frequency by lichen planopilaris (19%), fibrosing alopecia in a pattern distribution (18%), folliculitis decalvans (8%), discoid lupus (5.5%), and dissecting cellulitis (2%). Some specific types of alopecia were observed more frequently in women, others in men, with a predominance of central centrifugal cicatricial alopecia and traction alopecia in women of African origin, and dissecting cellulitis of the scalp and acne keloidalis in men of African origin. The proportion of patients under the age of 10 years was 2.4%. Among the pediatric hair conditions were in order of frequency: alopecia areata (39%), prepubertal pattern hair loss (24%), telogen effluvium (6%), hereditary hypotrichosis (6%), congenital triangular alopecia (4%), short anagen hair (4%), loose anagen hair (3%), trichotillomania (2%), and tinea capitis (1.4%).<\/jats:p>\n <\/jats:sec>\n \n Conclusion:<\/jats:title>\n Knowledge of the main types of alopecia and of their epidemiological and clinical specifics are prerequisite for providing an understanding of the etiologies and appropriate patient care in a respective specialty clinic.<\/jats:p>\n <\/jats:sec>","DOI":"10.4103\/ijt.ijt_57_24","type":"journal-article","created":{"date-parts":[[2025,6,23]],"date-time":"2025-06-23T15:00:19Z","timestamp":1750690819000},"page":"20-24","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":6,"title":["Frequency of Types of Alopecia in a Single-centre Hair Referral Clinic Over a Ten Years Period"],"prefix":"10.4103","volume":"17","author":[{"given":"Natalia Caballero","family":"Uribe","sequence":"first","affiliation":[{"name":"Center for Dermatology and Hair Diseases Professor Tr\u00fceb, Zurich-Wallisellen, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elisa","family":"Casa\u00f1as-Quintana","sequence":"additional","affiliation":[{"name":"Center for Dermatology and Hair Diseases Professor Tr\u00fceb, Zurich-Wallisellen, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ralph Michel","family":"Tr\u00fceb","sequence":"additional","affiliation":[{"name":"Center for Dermatology and Hair Diseases Professor Tr\u00fceb, Zurich-Wallisellen, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2025,6,23]]},"reference":[{"key":"R1-20250628","doi-asserted-by":"crossref","first-page":"309","DOI":"10.1159\/000496708","article-title":"Frequency of the types of alopecia at twenty-two specialist hair clinics:A multicenter study","volume":"5","author":"Va\u00f1\u00f3-Galv\u00e1n","year":"2019","journal-title":"Skin Appendage Disord"},{"key":"R2-20250628","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1016\/j.jaad.2006.12.029","article-title":"Anew classification of pattern hair loss that is universal for men and women:Basic and specific (BASP) classification","volume":"57","author":"Lee","year":"2007","journal-title":"J Am Acad Dermatol"},{"key":"R3-20250628","doi-asserted-by":"crossref","first-page":"55","DOI":"10.1159\/000249512","article-title":"Thomas more syndrome","volume":"220","author":"Tr\u00fceb","year":"2010","journal-title":"Dermatology"},{"key":"R4-20250628","doi-asserted-by":"crossref","first-page":"770","DOI":"10.1001\/archderm.1994.01690060100013","article-title":"Postmenopausal frontal fibrosing alopecia. Scarring alopecia in a pattern distribution","volume":"130","author":"Kossard","year":"1994","journal-title":"Arch Dermatol"},{"key":"R5-20250628","doi-asserted-by":"crossref","first-page":"205","DOI":"10.1001\/archderm.136.2.205","article-title":"Fibrosing alopecia in a pattern distribution:Patterned lichen planopilaris or androgenetic alopecia with a lichenoid tissue reaction pattern?","volume":"136","author":"Zinkernagel","year":"2000","journal-title":"Arch Dermatol"},{"key":"R6-20250628","doi-asserted-by":"crossref","first-page":"80","DOI":"10.4103\/ijt.ijt_83_17","article-title":"Graft versus host disease presenting as fibrosing alopecia in a pattern distribution:A model for pathophysiological understanding of cicatricial pattern hair loss","volume":"10","author":"Rezende","year":"2018","journal-title":"Int J Trichology"},{"key":"R7-20250628","doi-asserted-by":"crossref","first-page":"173","DOI":"10.1111\/ced.14865","article-title":"Prepubertal pattern hair loss","volume":"47","author":"Tr\u00fceb","year":"2022","journal-title":"Clin Exp Dermatol"},{"key":"R8-20250628","doi-asserted-by":"crossref","first-page":"612","DOI":"10.1111\/j.1365-2133.2000.03720.x","article-title":"Congenital hypotrichosis due to short anagen","volume":"143","author":"Barraud-Klenovsek","year":"2000","journal-title":"Br J Dermatol"},{"key":"R9-20250628","doi-asserted-by":"crossref","first-page":"105","DOI":"10.1159\/000216832","article-title":"Seasonality of hair shedding in healthy women complaining of hair loss","volume":"219","author":"Kunz","year":"2009","journal-title":"Dermatology"}],"container-title":["International Journal of Trichology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ovid.com\/10.4103\/ijt.ijt_57_24","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T15:36:18Z","timestamp":1787067378000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ovid.com\/10.4103\/ijt.ijt_57_24"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,1]]},"references-count":9,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2025]]}},"URL":"https:\/\/doi.org\/10.4103\/ijt.ijt_57_24","relation":{},"ISSN":["0974-7753","0974-9241"],"issn-type":[{"value":"0974-7753","type":"print"},{"value":"0974-9241","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,1]]},"assertion":[{"value":"2024-05-14","name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2024-10-04","name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}}]}}