Figure 1. Drawings illustrate a classification scheme for esophageal atresia and tracheoesophageal fistula. A = atresia without fistula, B = atresia with upper fistula, C = atresia with lower fistula, D = atresia with both lower and upper fistulas, E = tracheoesophageal fistula with no atresia. e = esophagus, s = stomach. Types A and B are similar radiographically, as are types C and D. Prevalence of the different types of atresia in 333 cases seen at the authors' institution over the past 18 years is as follows: A, 10%; B, 0.9%; C, 53%; D, 2.1%; and E, 10%. (Reprinted, with permission, from reference 5.)