1. Metastatic (stage IVc) or recurrent HNSCC 2. Histologically or cytologically confirmed diagnosis of squamous cell of the head and neck. Patients with well-differentiated (keratinizing) nasopharyngeal carcinomas and patients with squamous cell carcinomas metastatic to the neck from an unknown head and neck primary are eligible. 3. Patients must have documented progressive disease (PD) following receipt of prior platinum-based therapy (either as neoadjuvant, adjuvant, concomitant with radiotherapy, or for recurrent/ metastatic disease). 4. Patients must have measurable disease as defined by RECIST criteria. 5. Patients must have recovered from any therapy-related toxicities from previous chemo-, immuno-, or radiotherapies to CTC smaller or equal to Grade 1. 6. Patients must have recovered from previous surgery. 7. Life expectancy of at least three (3) months. 8. Eastern Cooperative Oncology Group (ECOG, R01-0787) performance score 0 or 1.