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Sinonasal Inverted Papilloma-Associated and De Novo Squamous Cell Carcinoma: A Tale of Two Cities or Not

Overview
Journal Cancers (Basel)
Publisher MDPI
Specialty Oncology
Date 2022 Nov 11
PMID 36358630
Authors
Affiliations
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Abstract

Background: Sinonasal squamous cell carcinoma (SNSCC) can arise as either inverted papilloma-associated SCC (IP-SCC) or as de novo SCC (DN-SCC). It is controversial as to whether survival differences between IP-SCC and DN-SCC exist.

Methods: Between January 2000 and December 2016, 234 patients with SNSCC were analyzed retrospectively, including 68 with IP-SCC and 166 with DN-SCC. Propensity score matching (PSM) was performed to balance baseline characteristics. The Kaplan-Meier method and Cox proportional hazard model were used to determine risk factors on survival outcomes.

Results: The median follow-up time was 98.4 months. Before PSM, lymph node metastasis was noted to be lower in patients with IP-SCC. After PSM, the 5-year DFS, DSS and OS between IP-SCC and DN-SCC were 43.0% vs. 44.5% ( = 0.701), 49.2% vs. 56.2% ( = 0.753), and 48.2% vs. 52.9% ( = 0.978). The annual hazards of local failure, respectively, peaked at 28.4% and 27.8% for IP-SCC and DN-SCC within 12 months after treatment. Afterward, the hazards gradually decreased and the hazard for IP-SCC was always higher before approaching null.

Conclusions: This study provides novel evidence to support the clinical utility of improved distinction between IP-SCC and DN-SCC. Further studies are necessary to validate these findings before considering escalation of IP-SCC.

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