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Initial contrast\u2011enhanced CT revealed the gluteal SCC, which was surgically excised and treated with adjuvant radiotherapy. Subsequent CT scan indicates a well\u2011circumscribed mass in the submucosa of the stomach. MRI and endoscopic biopsy confirmed a submucosal gastric GIST, which was completely resected. No recurrence of either malignancy has been observed on follow\u2011up. This case underscores the pivotal role of multimodality imaging in diagnosis, staging, and longitudinal care.<\/jats:p>","DOI":"10.1093\/bjrcr\/uaaf065","type":"journal-article","created":{"date-parts":[[2025,12,10]],"date-time":"2025-12-10T03:49:46Z","timestamp":1765338586000},"source":"Crossref","is-referenced-by-count":0,"title":["Unexpected metachronous multiple primary cancers: pilonidal sinus\u2011related squamous cell carcinoma and incidentally detected gastric gastrointestinal stromal tumour"],"prefix":"10.1093","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-5060-7621","authenticated-orcid":false,"given":"Carla-Ioana","family":"Hurjui","sequence":"first","affiliation":[{"name":"Radiation Oncology Department, Regional Institute of Oncology , Iasi, Iasi County, 700483,","place":["Romania"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sorinel","family":"Lunca","sequence":"additional","affiliation":[{"name":"Second Surgical Department, Regional Institute of Oncology , Iasi, Iasi County, 700483,","place":["Romania"]},{"name":"Grigore T. Popa University of Medicine and Pharmacy Surgery Department , Iasi, Iasi County, 700115,","place":["Romania"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anca","family":"Munteanu","sequence":"additional","affiliation":[{"name":"Radiation Oncology Department, Regional Institute of Oncology , Iasi, Iasi County, 700483,","place":["Romania"]},{"name":"Grigore T. Popa University of Medicine and Pharmacy, Third Medical Sciences Department , Iasi, Iasi County, 700115,","place":["Romania"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2025,12,9]]},"reference":[{"key":"2026011500112371900_uaaf065-B1","first-page":"146","volume-title":"Dis Colon Rectum.","author":"Johnson"},{"key":"2026011500112371900_uaaf065-B2","volume":"7"},{"key":"2026011500112371900_uaaf065-B3","doi-asserted-by":"crossref","first-page":"555","DOI":"10.1097\/MOG.0000000000000584","article-title":"Gastrointestinal stromal tumour: epidemiology, diagnosis, and treatment","volume":"35","author":"Mantese","year":"2019","journal-title":"Curr Opin Gastroenterol"},{"key":"2026011500112371900_uaaf065-B4","first-page":"800995","volume-title":"Front Endocrinol (Lausanne)","author":"Zhu","year":"2022"},{"key":"2026011500112371900_uaaf065-B5","doi-asserted-by":"crossref","first-page":"1218","DOI":"10.1158\/1055-9965.EPI-20-1245","article-title":"Type 2 diabetes and cancer: an umbrella review of observational and mendelian randomization studies","volume":"30","author":"Pearson-Stuttard","year":"2021","journal-title":"Cancer Epidemiol Biomarkers Prev"}],"container-title":["BJR|Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/academic.oup.com\/bjrcr\/advance-article-pdf\/doi\/10.1093\/bjrcr\/uaaf065\/65823690\/uaaf065.pdf","content-type":"application\/pdf","content-version":"am","intended-application":"syndication"},{"URL":"https:\/\/academic.oup.com\/bjrcr\/article-pdf\/12\/1\/uaaf065\/65823690\/uaaf065.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/academic.oup.com\/bjrcr\/article-pdf\/12\/1\/uaaf065\/65823690\/uaaf065.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T05:11:47Z","timestamp":1768453907000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/bjrcr\/article\/doi\/10.1093\/bjrcr\/uaaf065\/8375706"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,12,9]]},"references-count":5,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2026,1,15]]}},"URL":"https:\/\/doi.org\/10.1093\/bjrcr\/uaaf065","relation":{},"ISSN":["2055-7159"],"issn-type":[{"value":"2055-7159","type":"electronic"}],"subject":[],"published-other":{"date-parts":[[2026,1]]},"published":{"date-parts":[[2025,12,9]]},"article-number":"uaaf065"}}