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Extramedullary plasmacytoma (EMP) in the head and neck region is extremely uncommon, and therefore this case involving the paranasal sinuses is reported for its rarity and to demonstrate the importance of imaging in the diagnosis and follow-up of the disease. Both pathologies can progress to multiple myeloma, a much more common manifestation of the continuum of plasma cell neoplasms.<\/jats:p>","DOI":"10.1093\/bjrcr\/uaag009","type":"journal-article","created":{"date-parts":[[2026,4,11]],"date-time":"2026-04-11T18:32:09Z","timestamp":1775932329000},"source":"Crossref","is-referenced-by-count":0,"title":["A rare case of extramedullary plasmacytoma of the paranasal sinuses"],"prefix":"10.1093","volume":"12","author":[{"given":"Laiba","family":"Butt","sequence":"first","affiliation":[{"name":"York and Scarborough Teaching Hospitals NHS Foundation Trust, The York Hospital , York, YO31 8HE,","place":["United Kingdom"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Laura","family":"Munro","sequence":"additional","affiliation":[{"name":"York and Scarborough Teaching Hospitals NHS Foundation Trust, The York Hospital , York, YO31 8HE,","place":["United Kingdom"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrzej","family":"Wieczorek","sequence":"additional","affiliation":[{"name":"Queens Centre for Oncology & Haematology, Castle Hill Hospital, Hull University Teaching Hospitals NHS Trust , Cottingham, HU16 5JQ"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Robert","family":"Wotherspoon","sequence":"additional","affiliation":[{"name":"York and Scarborough Teaching Hospitals NHS Foundation Trust, The York Hospital , York, YO31 8HE,","place":["United Kingdom"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brook","family":"Adams","sequence":"additional","affiliation":[{"name":"York and Scarborough Teaching Hospitals NHS Foundation Trust, The York Hospital , York, YO31 8HE,","place":["United 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