Abstract
Sinus content specimens from patients with chronic rhinosinusitis (CRS) are commonly encountered by surgical pathologists across various practice settings. The inflammatory cellular component of CRS often includes eosinophil-rich inflammation, and the specimens frequently contain polyps. Moreover, noninvasive forms of fungal rhinosinusitis can also be identified in the sinus contents of patients with CRS. This article provides a succinct review of the histopathology of CRS and sinonasal inflammatory polyps.