Neoadjuvent chemotherapy in rare sinonasal teratocarcinosarcoma: Long-term result from tertiary center.

e18005 Background: Sinonasal teratocarcinosarcoma (SNTCS) is a rare and highly aggressive disease entity having poor outcomes with available treatment modalities. Surgery followed by radiation or radical chemoradiation are considered standard therapy. However, in very locally advanced diseases surgery or radiation is not feasible and such patients are subjected to palliative therapy and have dismal outcomes. Methods: We identified 21 patients with very locally advanced SNTCS in our prospectively maintained head and neck cancer database over the last 8 years. All patients were seen in a multidisciplinary clinic prior to the start of therapy and were deemed unfit for local therapy. They were planned for 2 – 3 cycles of Neoadjuvant chemotherapy (NACT). They were then assessed in the multidisciplinary clinic for local therapy. Depending upon the response and performance status further therapy was planned. SPSS version 20 was used for the analysis. Descriptive statistics were performed and the Kaplan Meier method was used to evaluate overall survival(OS) and progression-free survival(PFS). Results: Median age was 50 years (range 27-80 Years) with male to female ratio being 6:1. ECOG PS was 0 in 3(14%), PS 1 in 14(67%) and PS 2 in 2 (9%) patients. 14 (67%) patients had Kadish C and the rest (33%) had Kadish D stage at presentation. Cisplatin & Etoposide was the chemotherapy of choice for the majority of patients (14/21 patients, 67%) with Docetaxel – Cisplatin (5/21 patients,19%), and Ifosfamide – Adriamycin (2/21 patients, 9%) being the other regimens. After NACT 14/21(66%) patients underwent surgery,1/21(4%) underwent radical Chemoradiation,1/21(4%) for palliative radiation therapy and rest for best supportive care. R0 resection was achieved in 11 out of 14 (78.6%) patients. The median PFS of the study was 17.5 months (95% CI 8.2 – 26.7) and the median OS was 19 months (95% CI = 0 -47). Those who underwent surgery after NACT have achieved a median OS of 37.3 months(95% CI 0-77.7) in comparison to 6.3 months (95% CI 0.3 -12.2) for those without surgery (p value 0.02). Conclusions: NACT in very locally advanced SNTCS achieves resectability in ⅔ patients who were unresectable upfront and would have received palliative therapy. This is important as patients who undergo surgery have prolonged overall survival.