{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T15:53:39Z","timestamp":1777046019398,"version":"3.51.4"},"reference-count":16,"publisher":"BMJ","issue":"4","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2026,4,5]]},"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:p>Folliculosebaceous cystic hamartoma (FSCH) is a rare cutaneous hamartoma, composed of follicular, sebaceous and mesenchymal elements, that usually presents as a small papule or nodule on the central face. We report the case of a man in his early 30s with a 10-year history of a large, reddish to violaceous scalp mass measuring 4.5\u2009cm in greatest dimension. The initial clinical impression was a cylindroma. Histological examination revealed a dermal lesion with multiple sebaceous lobules clustered around a central infundibular structure within a fibrovascular stroma separated by cleft-like spaces. This case highlights an unusual clinical presentation and the importance of considering FSCH in the differential diagnosis of scalp masses.<\/jats:p>","DOI":"10.1136\/bcr-2025-270071","type":"journal-article","created":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T14:30:15Z","timestamp":1777041015000},"page":"e270071","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Folliculosebaceous cystic hamartoma presenting as a large scalp mass"],"prefix":"10.1136","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-0163-733X","authenticated-orcid":false,"given":"Amanda","family":"Chung","sequence":"first","affiliation":[{"name":"Department of Dermatology, University of the Philippines-Philippine General Hospital, Manila, Philippines"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ma. 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