Second Primary Malignancy in Patients with Hypopharyngeal Carcinoma: A SEER-Based Study

Area of Science:

• Oncology
• Epidemiology

Background:

• Secondary primary malignancy (SPM) risk in hypopharyngeal carcinoma (HPC) patients is understudied.
• Understanding SPM risk factors and survival impact is crucial for HPC management.

Purpose of the Study:

• To determine risk factors for SPM in HPC patients.
• To assess the effect of SPM on overall survival (OS) and cancer-specific survival (CSS) in HPC patients.

Main Methods:

• Population-based analysis using the SEER database (1973-2015).
• Logistic regression, Cox regression, and nomogram methods were employed.
• Identified risk factors and survival outcomes associated with SPM in HPC.

Main Results:

• HPC patients showed a significantly higher risk of SPM (SIR: 2.77).
• Elevated SPM risk observed in oral cavity, pharynx, digestive, respiratory, and endocrine systems.
• Factors like age (55-75), unmarried status, distant metastasis, and no prior surgery increased SPM risk.
• SPM was independently associated with better OS and CSS in HPC patients.

Conclusions:

• Despite an elevated risk, SPM does not decrease OS and CSS in HPC patients.
• This finding contradicts clinical expectations and warrants further investigation.
• Potential explanations include shorter HPC survival or insufficient follow-up duration.