{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,4]],"date-time":"2026-06-04T04:59:15Z","timestamp":1780549155027,"version":"3.54.1"},"reference-count":13,"publisher":"Mattioli1885","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>Introduction: Acne keloidalis nuchae (AKN) is a primary cicatricial alopecia with mixed infiltrate. It is more common in African or persons of African descent. Objectives: Our objective was to describe the epidemiology and clinical and trichoscopic presentations of AKN in a large series of Hispanic patients. Methods: This was a retrospective study from 10 different dermatological centers in Argentina, Colombia, Mexico, and Peru. Patients with a clinical diagnosis of AKN treated by 12 dermatologists experienced in trichology from 2018 to 2022 were included. The Umar classification system was used to determine severity. Results: We identified 142 patients with AKN: 98% were male (n=140) with a mean age of 32 years; 108 patients had a previous history of trauma to the nuchal area (76%, p&lt;0.001); and 48 were positive for a history of acne (33.8%, p=0.021). Patients with &gt;50 months of evolution were mainly classified in classes III and IV compared to patients with an evolution of &lt;50 months (30%, n=9 vs. 14%, n=15; p=0.019; respectively). Conclusion: AKN should be considered in the differential diagnosis in the Hispanic population. Advanced stages of the disease are correlated with chronic evolution.<\/jats:p>","DOI":"10.5826\/dpc.1403a198","type":"journal-article","created":{"date-parts":[[2024,7,31]],"date-time":"2024-07-31T10:22:18Z","timestamp":1722421338000},"page":"e2024198","source":"Crossref","is-referenced-by-count":3,"title":["Acne Keloidalis Nuchae: A Multicenter Retrospective Study of 142 Hispanic Patients"],"prefix":"10.5826","volume":"14","author":[{"given":"Luis E.","family":"S\u00e1nchez-Due\u00f1as","sequence":"first","affiliation":[{"name":"Dermatology Department, Dermika Centro Dermatol\u00f3gico L\u00e1ser, Guadalajara, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mariana G.","family":"Ungson-Garc\u00eda","sequence":"additional","affiliation":[{"name":"Dermatology Department, Hospital Regional \u201cDr. Valent\u00edn G\u00f3mez Far\u00edas\u201d, Guadalajara, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joel Alejandro","family":"Ramirez Sanchez","sequence":"additional","affiliation":[{"name":"Dermatology Department, Instituto Dermatol\u00f3gico de Jalisco \u201cDr. Jos\u00e9 Barba Rubio\u201d, Guadalajara, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ayala Barrera","family":"Antonio Michell","sequence":"additional","affiliation":[{"name":"Instituto Tecnol\u00f3gico y de Estudios Superiores de Monterrey, Guadalajara, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marti Machado","family":"Miguel","sequence":"additional","affiliation":[{"name":"Dr. Marti, Hair and Scalp Diseases Group, Buenos Aires, Argentina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sonia Sof\u00eda","family":"Ocampo-Garza","sequence":"additional","affiliation":[{"name":"Dermatology Department, Universidad Aut\u00f3noma de Nuevo Le\u00f3n, Hospital Universitario \u201cDr. Jos\u00e9 Eleuterio Gonz\u00e1lez\u201d, Monterrey, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lizet K.","family":"Rojano-Fritz","sequence":"additional","affiliation":[{"name":"Private Practice, Barranquilla, Colombia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aldo","family":"G\u00e1lvez-Canseco","sequence":"additional","affiliation":[{"name":"Private Practice, Lima, Per\u00fa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lidia Elena","family":"Bernal L\u00f3pez","sequence":"additional","affiliation":[{"name":"Private Practice, Hospital General \u201cDr. Manuel Gea Gonzalez\u201d, CDMX, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniela","family":"Gutierrez Mendoza","sequence":"additional","affiliation":[{"name":"Private Practice, Tijuana, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roxana","family":"Casta\u00f1eda Yepiz","sequence":"additional","affiliation":[{"name":"Private Practice, Tijuana, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Araceli","family":"Alvarado Delgadillo","sequence":"additional","affiliation":[{"name":"Centro Especializado en Enfermedades de la Piel (CEEPIEL), Hidalgo, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yakelin","family":"Morales Miranda","sequence":"additional","affiliation":[{"name":"Private Practice, Hospital Angeles Lomas, CDMX, Mexico"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"27750","published-online":{"date-parts":[[2024,7,31]]},"reference":[{"key":"10.5826\/dpc.1403a198_ref1","doi-asserted-by":"crossref","unstructured":"Ogunbiyi A. Acne keloidalis nuchae: prevalence, impact, and management challenges. Clin Cosmet Investig Dermatol. 2016;9:483-489. doi: 10.2147\/CCID.S99225.","DOI":"10.2147\/CCID.S99225"},{"key":"10.5826\/dpc.1403a198_ref2","doi-asserted-by":"crossref","unstructured":"Adegbidi H, Atadokpede F, do Ango-Padonou F, Yedomon H. Keloid acne of the neck: epidemiological studies over 10 years. Int J Dermatol. 2005;44 Suppl 1:49-50. doi: 10.1111\/j.1365-4632.2005.02815.x.","DOI":"10.1111\/j.1365-4632.2005.02815.x"},{"key":"10.5826\/dpc.1403a198_ref3","doi-asserted-by":"crossref","unstructured":"Maranda EL, Simmons BJ, Nguyen AH, Lim VM, Keri JE. Treatment of acne keloidalis nuchae: a systematic review of the literature. Dermatol Ther (Heidelb). 2016;6(3):363-78. doi: 10.1007\/s13555-016-0134-5.","DOI":"10.1007\/s13555-016-0134-5"},{"key":"10.5826\/dpc.1403a198_ref4","doi-asserted-by":"crossref","unstructured":"Shapero J, Shapero H. 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