LAUSR

Exposure at the World Trade Center (WTC) terrorist collapse site on September 11, 2001 has been associated with increased cancer risk, though observational studies have identified very few cases of head and neck cancer (HNC) in exposed individuals. Eighty seven patients were identified who presented to our institution with HNC diagnosed from 2002 to 2017 who reported WTC exposure. The annual number and proportion of WTC‐exposed HNC patients has been steadily increasing since 2002, with most cancers developing >10 years following the event. Furthermore, WTC‐exposed patients with human papillomavirus (HPV)‐positive OPC experienced significantly inferior outcomes compared with non‐WTC exposed patients with HPV+ OPC (disease free survival 80.1% vs. 65.6% at 4 years, p = 0.04). This single institution study cannot establish evidence of exposure‐mediated causation but higher recurrence rates in the WTC‐exposed HPV+ OPC population suggest a treatment refractory tumor biology and possible exposure synergism with HPV‐mediated oncogenesis.