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Pathology revealed moderately differentiated intestinal type adenocarcinoma of colonic subtype, immune histochemistry was positive for CDX2, CK20 and MUC2, thus confirming metastatic disease to the maxilla. The patient is undergoing chemoradiation therapy for palliation of his symptoms. Clinicians should be aware of this potentional site of metastatic disease and suspect the diagnosis in a timely manner to avoid delays in making a diagnosis.<\/jats:p>","DOI":"10.1136\/bcr-2021-244485","type":"journal-article","created":{"date-parts":[[2021,9,17]],"date-time":"2021-09-17T12:02:12Z","timestamp":1631880132000},"page":"e244485","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":2,"title":["Rare case of metastatic adenocarcinoma to the maxillary sinus"],"prefix":"10.1136","volume":"14","author":[{"given":"Apurwa","family":"Prasad","sequence":"first","affiliation":[{"name":"Internal Medicine, AMITA Health Saint Joseph Hospital, Chicago, Illinois, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Taha","family":"Alrifai","sequence":"additional","affiliation":[{"name":"Department of Hematology\/Oncology\/Cell Therapy, Rush University Medical Center, Chicago, Illinois, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8555-1335","authenticated-orcid":false,"given":"Sumathi","family":"Vijaya Rangan","sequence":"additional","affiliation":[{"name":"Internal Medicine, AMITA Health Saint Joseph Hospital, Chicago, Illinois, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jessica","family":"Garcia","sequence":"additional","affiliation":[{"name":"Department of Hematology\/Oncology, AMITA Health Saint Joseph Hospital, Chicago, Illinois, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2021,9,17]]},"reference":[{"key":"2025082802393760000_14.9.e244485.1","unstructured":"Key statistics for colorectal cancer. 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