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We present the unusual case of an 87-year-old diabetic male with a giant form of reactive perforating collagenosis and review the available literature. <\/jats:p>","DOI":"10.1177\/2054270420981452","type":"journal-article","created":{"date-parts":[[2021,2,11]],"date-time":"2021-02-11T16:12:40Z","timestamp":1613059960000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Necrotic plaques in an elderly male"],"prefix":"10.1177","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9589-0338","authenticated-orcid":false,"given":"Bindi","family":"Gaglani","sequence":"first","affiliation":[{"name":"Department of Dermatology, Ealing Hospital, Southall, UB1 3HW, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ian","family":"Logan","sequence":"additional","affiliation":[{"name":"Department of Dermatology, Ealing Hospital, Southall, UB1 3HW, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Faris","family":"Kubba","sequence":"additional","affiliation":[{"name":"Department of Dermatology, Ealing Hospital, Southall, UB1 3HW, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2021,2,11]]},"reference":[{"key":"bibr1-2054270420981452","doi-asserted-by":"crossref","unstructured":"Schreml S, Hafner C, Eder F, Landthaler M, Burgdorf W, Babilas P. Kyrle disease and acquired perforating collagenosis secondary to chronic renal failure and diabetes mellitus. Case Rep Dermatol 2011; 3: 209\u2013211.","DOI":"10.1159\/000333005"},{"key":"bibr2-2054270420981452","doi-asserted-by":"crossref","unstructured":"Kim RH, Kwa M, Adams S, Meehan SA, Stein JA. Giant acquired reactive perforating collagenosis in a patient with diabetes mellitus and metastatic breast carcinoma. JAAD Case Rep 2016; 2: 22-24.","DOI":"10.1016\/j.jdcr.2015.11.013"},{"key":"bibr3-2054270420981452","doi-asserted-by":"crossref","unstructured":"Schreml S, Hafner C, Eder F, Landthaler M, Burgdorf W, Babilas P. Kyrle disease and acquired perforating collagenosis secondary to chronic renal failure and diabetes mellitus. Case Rep Dermatol 2011; 3: 209\u2013211.","DOI":"10.1159\/000333005"},{"key":"bibr4-2054270420981452","doi-asserted-by":"crossref","unstructured":"Rivera-Rodr\u00edguez A, Prieto-Torres L, Felipo-Berlanga F, Ara-Mart\u00edn M. Acquired reactive perforating collagenosis associated with Hodgkin disease. Clin Exp Dermatol] 2017; 42: 934\u2013936.","DOI":"10.1111\/ced.13192"},{"key":"bibr5-2054270420981452","doi-asserted-by":"crossref","unstructured":"Sato-Sano M, Cury-Martins J, Macarenco R, Domingues RB, Vasconcelos R, Sanches JA. Perforating dermatosis associated with multikinase inhibitors: report of two cases, including one associated with lenvatinib. J Dtsch Dermatol Ges 2018; 16(12): 1486\u20131489.","DOI":"10.1111\/ddg.13704"},{"key":"bibr6-2054270420981452","doi-asserted-by":"crossref","unstructured":"Lederhandler M, Beasley JM, Brinster NK, Nagler AR. Unusual eruption in association with sorafenib: a case of acquired perforating dermatosis, reactive perforating collagenosis type. Dermatol Online J 2018; 24: 13030\/qt8b40k5kg.","DOI":"10.5070\/D32412042445"},{"key":"bibr7-2054270420981452","doi-asserted-by":"crossref","unstructured":"Ormerod E, Atwan A, Intzedy L, Stone N. Dermoscopy features of acquired reactive perforating collagenosis: a case series. 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