A year earlier at the second meeting of the European Society for Pediatric Neurosurgery a number of North Americans had submitted papers to be read and had also applied for membership. Rougerie held a small meeting in Paris just prior to the ESPN meeting that was attended by officers of the ESPN and other interested parties including Anthony Raimondi. A debate ensued on whether or not to convert the ESPN to an international society. It was decided to maintain the ESPN but to also explore founding an international society. The following year Anthony Raimondi hosted a meeting in Chicago in 1972 for just such a purpose. It was attended by:

• Raul Carrea (Argentina)
• Maurice Choux (France)
• Steen Flood (Norway)
• Bruce Hendricks (Canada)
• Wolfgang Koos (Austria)
• Satoshi Matsumoto (Japan)
• Jean Pecker (U.K.)
• Anthony J. Raimondi (U.S.A.)
• Jacques Rougerie (France)
• John Shaw (U.K.)
• Kenneth Till (U.K.)

They organized the ISPN and Jac Rougerie was appointed President Pro Tem, Anthony J Raimondi Secretary pro Tem and Joseph Ransohoff Treasurer Pro Tem. Raul Carrea was appointed By-Laws Chair, Maurice Choux Membership Chair, Anthony J Raimondi Education and Publication Chair, Raul Carrea liaison to the World Federation of Neurological Surgeons and Satoshi Matsumoto as the Program Chair. It was decided that the Society's first meeting should be held the following year in Tokyo with Satoshi Matsumoto being its host. Finally, it was agreed upon that the name of the society should be the International Society for Paediatric Neurosurgery. At the meeting in Tokyo in 1973 Jacques Rougerie was elected President of the Society at the meeting. This meeting established the tradition of the meeting being held at interesting venues throughout the world being loyally attended by members from the world's five continents. There was also an unstated guideline that the meeting could not be held in the same location twice. Over the ensuing years the meetings were characterized by stimulating debate over papers delivered by members and guests on the latest topics of interest to pediatric neurosurgeons. Each meeting is highlighted by a gala dinner where the office of the presidency is pasted onto the president-elect. In 1979 Anthony Raimondi added the tradition of the passing of the Poncho, the Society's symbol for its presidency.

The second meeting of the Society was held in London and it was at that meeting that the Society's secretary and Chairman of the Education and Publication Committee, Anthony Raimondi, announced the creation of Child's Brain, the official journal for the ISPN. In 1985 the Society chose the name Child's Nervous System as its new official journal after irreconcilable differences arose between the ISPN and the publisher of Child's Brain. The ISPN has proudly maintained editorial control over its journals and have utilized them to advance the specialty of pediatric neurosurgery for over three decades.