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Synchronous breast and colon cancers are infrequent and present management challenges due to the lack of standardized guidelines. We report a 73\u2010year\u2010old woman presenting with a right breast mass, subsequently diagnosed as Grade 2 invasive ductal carcinoma. Staging CT incidentally revealed right colon wall thickening, and colonoscopy with biopsy confirmed moderately differentiated invasive adenocarcinoma. Following neoadjuvant chemotherapy, she underwent simultaneous radical mastectomy with axillary lymph node dissection and right hemicolectomy. Postoperative recovery was uneventful. Adjuvant chemoradiation was administered per multidisciplinary team (MDT) recommendation. Synchronous breast and colon cancers pose unique diagnostic and treatment planning challenges. MDT collaboration is crucial for personalized treatment strategies and optimized outcomes in these complex cases.<\/jats:p>","DOI":"10.1155\/crom\/7164628","type":"journal-article","created":{"date-parts":[[2025,3,11]],"date-time":"2025-03-11T20:22:21Z","timestamp":1741724541000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Synchronous Primary Malignancies: Incidental Detection of Ascending Colon Adenocarcinoma During Staging of Invasive Ductal Carcinoma of the Breast"],"prefix":"10.1155","volume":"2025","author":[{"given":"Salif","family":"Balde","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-7819-5237","authenticated-orcid":false,"given":"Ulrich Igor Mbessoh","family":"Kengne","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jaafar Ibn Abou Talib","family":"Thiam","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7913-2927","authenticated-orcid":false,"given":"Jo\u00ebl Gabin Konlack","family":"Mekontso","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sokhna Diop","family":"Niang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Amacoumba","family":"Fall","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mamadou","family":"Ndiaye","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gorgui","family":"Sarr","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Etienne Tossou","family":"Zoure","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mamadou","family":"Sow","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sidy","family":"Ka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,3,11]]},"reference":[{"key":"e_1_2_9_1_2","doi-asserted-by":"publisher","DOI":"10.1007\/s10620-021-07296-5"},{"key":"e_1_2_9_2_2","doi-asserted-by":"publisher","DOI":"10.7759\/cureus.21660"},{"key":"e_1_2_9_3_2","doi-asserted-by":"publisher","DOI":"10.3892\/ol.2023.14014"},{"key":"e_1_2_9_4_2","doi-asserted-by":"publisher","DOI":"10.1136\/bcr-2019-232680"},{"key":"e_1_2_9_5_2","doi-asserted-by":"publisher","DOI":"10.7759\/cureus.24798"},{"key":"e_1_2_9_6_2","doi-asserted-by":"publisher","DOI":"10.7759\/cureus.13314"},{"key":"e_1_2_9_7_2","doi-asserted-by":"publisher","DOI":"10.7759\/cureus.4287"},{"key":"e_1_2_9_8_2","first-page":"259","article-title":"Association synchrone d\u2019un cancer du sein et du c\u00f4lon chez la femme","volume":"61","author":"Randriamanovontsoa N.","year":"2014","journal-title":"M\u00e9decine d\u2032Afrique Noire"},{"key":"e_1_2_9_9_2","doi-asserted-by":"publisher","DOI":"10.1136\/bcr-2013-009450"},{"key":"e_1_2_9_10_2","doi-asserted-by":"publisher","DOI":"10.1155\/2017\/7048149"},{"key":"e_1_2_9_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijscr.2014.04.020"},{"key":"e_1_2_9_12_2","doi-asserted-by":"publisher","DOI":"10.7759\/cureus.3207"},{"key":"e_1_2_9_13_2","first-page":"409","article-title":"Synchronous primary malignant tumors of the breast, caecum and sigma. 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