an event · TurkeyThe Declaration of Istanbul, 2008

A consensus statement agreed at an international summit in Istanbul in 2008, convened by The Transplantation Society and the International Society of Nephrology, which defined organ trafficking, transplant commercialism and transplant tourism and called for the first two to be prohibited. It is the reason those three phrases have fixed meanings, and the reason one kind of cross-border medical travel is treated by the profession as categorically different from the rest.

The summit ran in Istanbul from 30 April 2008. "None of the 152 participants from 78 countries was polled with respect to his or her opinion, practice, or philosophy before selection. The declaration was agreed by consensus among the summit's participants." The Lancet Comment announcing it dates the meeting 30 April to 1 May; the Declaration's own preamble runs it to 2 May.

The definitions are the working part. "Transplant commercialism is a policy or practice in which an organ is treated as a commodity, including by being bought or sold or used for material gain." And the one that draws the line through this whole directory: "Travel for transplantation is the movement of organs, donors, recipients, or transplant professionals across jurisdictional borders for transplantation purposes. Travel for transplantation becomes transplant tourism if it involves organ trafficking and/or transplant commercialism or if the resources (organs, professionals, and transplant centres) devoted to providing transplants to patients from outside a country undermine the country's ability to provide transplant services for its own population."

Read that carefully. Crossing a border for a transplant is not condemned. What is condemned is buying an organ, and drawing down a poorer country's transplant capacity to serve visitors. The declaration then demanded prohibitions extending to "all types of advertising (electronic and print), soliciting, or brokering for the purpose of transplant commercialism".

The scale claim in the same Comment shows what the field had to work with. "WHO has estimated that about 10% of organ transplants around the world involve these unacceptable activities" — attributed in the text to a personal communication from a named WHO officer, not to a published series. Beside it sits a harder figure: "by 2006, two-thirds of the 2000 kidney transplants in Pakistan were for foreign recipients".

A revised edition was presented in Madrid on 1 July 2018, after a consultation earlier that year. It drops transplant commercialism as a separate defined term, takes its trafficking definitions from the Council of Europe convention and the United Nations protocol, and rewrites the tourism clause around non-resident patients: "Travel for transplantation becomes transplant tourism, and thus unethical, if it involves trafficking in persons for the purpose of organ removal or trafficking in human organs, or if the resources (organs, professionals and transplant centres) devoted to providing transplants to non-resident patients undermine the country's ability to provide transplant services for its own population."

The Declaration of Istanbul Custodian Group, formed by the two founding societies in 2010, maintains the text and the endorsement list. Its endorsements page states "the complete list of 173 endorsing organizations", while another page on the same site still says more than 135 — a discrepancy this record reports rather than resolves.

This is a professional declaration, not law. It binds nobody by itself; its force comes from the societies, journals and ministries that adopted it, and from the national statutes written afterwards.