Paranasal Sinus and Nasal Cavity Cancers: Systematic Review and Executive Summary of the American Radium Society Appropriate Use Criteria.

Tumors of the paranasal sinus and nasal cavity (PNS/NC) are rare and exhibit diverse histology, anatomic subsite, and malignant potential. Early-stage disease is typically managed with surgery, and locally advanced disease is treated with a combination of surgery, radiotherapy, and chemotherapy. Clinical decision-making is commonly guided by limited retrospective evidence. To address this limitation, we performed a systematic review to inform evidence-based consensus for the management of common clinical scenarios, including the potential roles of radiation and systemic therapy to promote structural preservation, elective neck management, and radiation technique considerations. A librarian-mediated literature search identified 39 studies of adult patients with PNS/NC tumors treated with curative intent that met the study inclusion criteria. Search results were reported using the preferred reporting items for systematic reviews and meta-analyses (PRISMA) methodology. A modified-Delphi process was used to guide consensus for the appropriate use of various management strategies. Strong consensus existed for the appropriateness of primary surgery for early-stage disease, approaches to locally advanced disease with minimal periorbital fat invasion, and the use of induction chemotherapy with response-directed local therapy. Consensus regarding nodal treatment and the use of proton therapy in the adjuvant setting was less robust. The rarity and diversity of PNS/NC tumors limit randomized phase III trials to guide management. As such, this systematic review and appropriate-use consensus statements provide clinical guidance for the management of this challenging disease spectrum.