"The Most Satisfactory Procedure in the Field of Pediatric Surgery": The History of Hypertrophic Pyloric Stenosis.

This historical retrospective explores the history of hypertrophic pyloric stenosis from its initial observations to the first surgical approaches to modern understandings of pathogenesis. The important work of Hirschsprung, Fredet, and Ramstedt remains a foundational part of management for this complex condition.