{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T19:37:35Z","timestamp":1787773055730,"version":"build-2784847793"},"reference-count":9,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"2","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2022,3]]},"abstract":"<jats:sec>\n                    <jats:title\/>\n                    <jats:p>Proliferating pilar tumours, also known as trichilemmal tumours, are rare tumours that arise from the external root sheath of hair follicles. These lesions usually have a firm-to-soft texture and form small nodules, but may grow gradually, causing pressure ulceration or hyperkeratinisation. Because of this feature, care should be taken to differentiate proliferating pilar tumours from squamous cell carcinoma. An 89-year-old woman presented with a protruding horn-shaped mass on her left malar area, which was first misdiagnosed as squamous cell carcinoma and then revealed to be a low-grade malignant proliferating pilar tumour. We report this case due to its rarity and clinically atypical characteristics.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.4103\/ijd.ijd_58_21","type":"journal-article","created":{"date-parts":[[2024,8,29]],"date-time":"2024-08-29T17:19:56Z","timestamp":1724951996000},"page":"207","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":2,"title":["Proliferating Pilar Tumor of the Cheek Misdiagnosed as Squamous Cell Carcinoma"],"prefix":"10.4103","volume":"67","author":[{"given":"Se Il","family":"Lee","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joo Heon","family":"Choi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kun Yong","family":"Sung","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joonhong","family":"Min","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hong Sil","family":"Joo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","reference":[{"key":"R1-48-20240829","doi-asserted-by":"crossref","first-page":"234","DOI":"10.1002\/1097-0142(196802)21:2<234::AID-CNCR2820210211>3.0.CO;2-J","article-title":"Tumours of the lower hair sheath: Common histogenesis of certain so called \u201csebaceous sheath\u201d, acanthomas and \u201csebaceous carcinomas\u201d","volume":"21","author":"Holmes","year":"1968","journal-title":"Cancer"},{"key":"R2-48-20240829","doi-asserted-by":"crossref","first-page":"203","DOI":"10.1159\/000249868","article-title":"Development of a malignant proliferating trichilemmal cyst in a patient with multiple trichilemmal cysts","volume":"166","author":"Saida","year":"1983","journal-title":"Dermatologica"},{"key":"R3-48-20240829","first-page":"S28","article-title":"Malignant proliferating trichilemmal tumors with CD34 expression","volume":"93","author":"Chaichamnan","year":"2010","journal-title":"J Med Assoc Thai"},{"key":"R4-48-20240829","first-page":"1102","article-title":"Proliferating trichilemmal tumors: A review of the literature","volume":"33","author":"Satyaprakash","year":"2007","journal-title":"Dermatol Surg"},{"key":"R5-48-20240829","doi-asserted-by":"crossref","first-page":"566","DOI":"10.1309\/0XLEGFQ64XYJU4G6","article-title":"Proliferating pilar tumors: A clinicopathologic study of 76 cases with a proposal for definition of benign and malignant variants","volume":"122","author":"Ye","year":"2004","journal-title":"Am J Clin Pathol"},{"key":"R6-48-20240829","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1016\/S0190-9622(86)70015-7","article-title":"Development of proliferating trichilemmal cyst in organoid nevus: Presentation of two cases","volume":"14","author":"Rahbari","year":"1986","journal-title":"J Am Acad Dermatol"},{"key":"R7-48-20240829","doi-asserted-by":"crossref","first-page":"479","DOI":"10.1097\/00000372-199010000-00008","article-title":"Proliferating trichilemmal cyst with spindle cell carcinoma","volume":"12","author":"Mori","year":"1990","journal-title":"Am J Dermatopathol"},{"key":"R8-48-20240829","doi-asserted-by":"crossref","first-page":"542","DOI":"10.1046\/j.1365-2559.1998.00549.x","article-title":"Malignant proliferating trichilemmal tumours: An histopathological and immunohistochemical study of three cases with DNA ploidy and morphometric evaluation","volume":"33","author":"Herrero","year":"1988","journal-title":"Histopathology"},{"key":"R9-48-20240829","doi-asserted-by":"crossref","first-page":"240","DOI":"10.4103\/0973-1482.39001","article-title":"Malignant pilar tumor of scalp: A case report and review of literature","volume":"3","author":"Sidda","year":"2007","journal-title":"J Cancer Res Ther"}],"container-title":["Indian Journal of Dermatology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ovid.com\/10.4103\/ijd.ijd_58_21","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T19:16:59Z","timestamp":1787771819000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ovid.com\/10.4103\/ijd.ijd_58_21"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,3]]},"references-count":9,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2022]]}},"URL":"https:\/\/doi.org\/10.4103\/ijd.ijd_58_21","relation":{},"ISSN":["0019-5154"],"issn-type":[{"value":"0019-5154","type":"print"}],"subject":[],"published":{"date-parts":[[2022,3]]}}}