Endoscopic sinus surgery (ESS) is now taught in most otolaryngology re
sidency programs in the United States. However, this is techically cha
llenging surgery and concerns exist regarding patient safety early in
the surgeon's learning curve. The authors reviewed 193 cases of ESS pe
rformed by residents, under faculty supervision at our program, betwee
n 1987 and 1992. Sixty-seven percent of patients underwent bilateral a
nterior ethmoidectomy, 40% had bilateral total ethmoidectomy, and 44%
had bilateral middle turbinate reduction. The overall complication rat
e was 22% and included one major complication. Synechiae accounted for
50% of minor complications. There was no correlation between middle o
r inferior turbinate reduction and the formation of synechiae. Posteri
or ethmoidectomy was not associated with a significant increase in com
plications. We conclude that ESS can be safely performed by otolaryngo
logy residents in carefully structured and supervised training program
s.