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Histological examination of a scalp nodule in the region of a previously excised SCC revealed proliferation of osteoid surrounded by malignant osteocytes. An overview of this condition and differential diagnoses are presented in this report.<\/jats:p>","DOI":"10.1136\/bcr-2017-222641","type":"journal-article","created":{"date-parts":[[2018,5,18]],"date-time":"2018-05-18T13:30:41Z","timestamp":1526650241000},"page":"bcr-2017-222641","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Primary cutaneous osteosarcoma of the scalp"],"prefix":"10.1136","volume":"2018","author":[{"given":"Yusra","family":"Al-Janabi","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Khalid","family":"Al-Janabi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kallirroi","family":"Tzafetta","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mahir","family":"Petkar","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2018,5,18]]},"reference":[{"key":"2025042703405511000_2018.may16_1.bcr-2017-222641.1","doi-asserted-by":"crossref","first-page":"e879","DOI":"10.1111\/j.1365-2230.2009.03637.x","article-title":"Primary cutaneous osteoblastic osteosarcoma: a case report and review of the current literature","volume":"34","author":"Riddle","year":"2009","journal-title":"Clin Exp Dermatol"},{"key":"2025042703405511000_2018.may16_1.bcr-2017-222641.2","doi-asserted-by":"crossref","first-page":"S160","DOI":"10.5021\/ad.2011.23.S2.S160","article-title":"Cutaneous extraskeletal osteosarcoma on the scar of a previous bone graft","volume":"23","author":"Park","year":"2011","journal-title":"Ann Dermatol"},{"key":"2025042703405511000_2018.may16_1.bcr-2017-222641.3","doi-asserted-by":"crossref","first-page":"61","DOI":"10.1111\/j.1600-0560.2006.00562.x","article-title":"Primary cutaneous osteosarcoma of the scalp: a case report and review of the literature","volume":"34","author":"Massi","year":"2007","journal-title":"J Cutan Pathol"},{"key":"2025042703405511000_2018.may16_1.bcr-2017-222641.4","unstructured":"Buehler D , Billings S . 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Primary cutaneous extraskeletal osteosarcoma. In: Rongioletti F , Margaritescu I , Smoller B , eds. Rare Malignant Skin Tumors. 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