Planning anesthesia of a child with a rare disease: useful tools.

Up to 8,000 rare diseases are currently described in the scientific literature. The presence of a rare disease constitutes an additional challenge for the practitioner given its implications on the management of anesthesia. Moreover, it is not possible for an anesthesiologist to know them all especially as the sources of information are scattered. This narrative review aims at proposing pre-anesthetic evaluation clear tools to summarize the individual aspects of a known or suspected rare disease in a patient and to define an adapted anesthetic strategy. It also describes a decision-making process, called « the rare disease reflex », to guide the practitioner to quickly initiate diagnostic investigations in the presence of unusual perioperative clinical signs suggestive of an undiagnosed rare disease.