The incidence of anal cancer has been increasing over the past decade, but currently still constitutes 0.5% of all cancer diagnoses in the United States. When the cancer has metastasised, prognosis remains poor, with relative 5-year survival rates of approximately 30%. The current standard of care for metastatic anal cancer is cisplatin-based chemotherapy combined with 5-fluorouracil (5-FU). However, no randomised clinical trial investigating the optimal chemotherapy regimen for this disease has been conducted. The InterAAct trial was launched to investigate cisplatin plus FU against carboplatin plus paclitaxel in advanced anal cancers, and full results were recently published in the Journal of Clinical Oncology.