Recurrence patterns with concurrent platinum-based chemotherapy and accelerated hyperfractionated radiotherapy in stage III and IV head and neck cancer patients.

BACKGROUND

Stage III and IV squamous cell cancers of the head and neck are often unresectable at presentation and are associated with poor disease-free and overall survival rates. A phase II study using concurrent cisplatin and radiotherapy in advanced head and neck cancer indicated impressive local-regional control and survival with organ preservation.

METHODS

A multicentered phase II study was undertaken consisting of 1.8 Gy fraction radiotherapy for 2 weeks followed by 1.2 Gy BID hyperfractionation to 46.8 Gy. Continuous infusion cisplatin 20 mg/m2 was given on days 1 through 4 and 22 through 25. Biopsy of the primary tumor was done at this point, and patients with clinical and pathologic complete response continued with hyperfractionated radiotherapy to 75.6 Gy plus simultaneous carboplatin 25 mg/m2 BID for 12 consecutive days. Residual disease at 46.8 Gy required curative surgery.

RESULTS

Seventy-four patients entered the study, and 73 completed their treatment. Twenty were stage III and 54 were stage IV. Fifty patients had involved regional lymph nodes. Treatment was well tolerated with only one grade IV hematologic toxicity. At 46.8 Gy, biopsy revealed a complete response in 75% of the primary sites and 47% of the nodes. Only 12 patients required resection of the primary lesion. At 4 years (median follow-up is 26 months), 29 patients have recurred.

CONCLUSIONS

Accelerated hyperfractionated radiotherapy with concurrent chemotherapy in stage III and IV head and neck cancer yields excellent local-regional control with organ preservation. This protocol is intensive, and some patients have distant failures.