The International Collaboration on Cancer Reporting (ICCR) is a quadripartite alliance formed by the Royal College of Pathologists of Australasia, the Royal College of Pathologists of the United Kingdom, the College of American Pathologists, and the Canadian Partnership Against Cancer. The ICCR was formed with a view to reducing the global burden of cancer data set development and reduplication of effort by different international institutions that commission, publish, and maintain standardized cancer-reporting data sets. The resultant standardization of cancer reporting would be expected to benefit not only those countries directly involved in the collaboration but also others not in a position to develop their own data sets.