To inform the review, we conducted a literature search of the PubMed database for articles in English published before 7 February 2024 using search terms (TSLP [all fields] OR thymic stromal lymphopoietin [all fields] AND chronic rhinosinusitis [all fields] OR CRSwNP [all fields] OR nasal polyp* [all fields]), employing the ‘Humans’ species filter and excluding review articles. This evidence concerns the gene TSLP and Nasal polyposis.