Squamous cell carcinoma of the anal canal (SCCA) is a rare disease and mostly diagnosed at an early stage. After standard concurrent chemoradiation (CRT) with mitomycin (MMC) and 5-fluorouracil (5FU), the disease will recur in 20% of patients. After treatment failure (including salvage surgery), cisplatin-5FU combination is the standard option but complete response is a rare event and the prognosis remains poor with most patients' death occurring in the first 12 months. Decision making for physicians in this setting is only based on retrospective studies or small phase II clinical trials including less than 20 patients. Hence, no efficient standard of care is currently available for relapsing SCCA patients who are currently treated with a palliative intent.