Is taxane/platinum/5 fluorouracil superior to taxane/platinum alone and does docetaxel trump paclitaxel in induction therapy for locally advanced oral cavity cancers?

Background: Cisplatin and 5 fluorouracil drug combination is inferior to the combination of taxane with these 2 drugs. However, often in clinical practice at our center giving TPF (docetaxel, cisplatin, 5 fluorouracil) is difficult in view of logistics and tolerance issues. In such a scenario, we prefer to use the 2 drugs combination of platinum and taxane. However, no study has addressed whether a 2 drugs combination, which includes taxane is inferior to the 3 drugs combination and which the taxane of choice is in the 2 drugs combination of taxane and platinum.
Methods: This is a retrospective analysis of prospectively collected data of patients undergoing induction chemotherapy (IC) in oral cavity cancers from 2010 to 2012. We chose for analysis those patients who had a baseline scan done within 4 weeks of starting therapy and a follow-up scan done within 2 weeks of completion of the second cycle of IC. Response was scored in accordance with RECIST version 1.1. Chi-square analysis was done to compare response rates (RRs) between regimens.
Results: Two hundred and forty-five patients were identified. The median age was 45 years (24-70 years), 208 (84.9%) were male patients, and 154 patients (62.9%) had primary in the Buccal mucosa. The regimens received were TPF 22 (9%), docetaxel + cisplatin 97 (39.6%), paclitaxel + cisplatin 89 (36.3%), docetaxel + carboplatin 16 (6.5%) and paclitaxel + carboplatin 21 (8.6%). The overall RRs were complete response, partial response, stable disease and progressive disease in 4 (1.6%), 56 (22.9%), 145 (59.2%) and 40 (16.3%). The 3 drugs regimen (TPF) had 50% RR as compared to 22% RR with 2 drugs regimen (P = 0.004). Docetaxel containing regimens had 30.3% RR as compared to 17.2% RR with paclitaxel containing regimens (P = 0.094).
Conclusions: TPF has better RR than a 2 drugs taxane-containing regimen and docetaxel leads to a better RR than paclitaxel for IC in locally advanced oral cavity cancers.