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Modified transnasal endoscopic Lothrop procedure as an alternative to frontal sinus obliteration.
Otolaryngology - Head and Neck Surgery 1995 October
Persistent frontal sinusitis traditionally has been treated with external procedures such as osteoplastic frontal sinus obliteration or the Lynch procedure. Currently, functional endoscopic sinus surgery can be used in most cases to remove disease from the frontal recess, the most frequent site of frontal sinus obstruction, thereby relieving the sinusitis. In some cases, however, frontal recess exploration has failed to relieve the obstruction of the frontal sinus, necessitating an osteoplastic frontal sinus obliteration. We present our experience with a transnasal modification of the Lothrop procedure. The Lothrop procedure, first described in 1914, uses a combined external and transnasal approach to resect the median frontal sinus floor, superior nasal septum, and intersinus septum to drain the frontal sinus. This procedure was largely abandoned and forgotten by modern otolaryngologists. However, with the advent of the computed tomography scan and endoscopic techniques, we sought to reassess the basic tenant of the Lothrop procedure (i.e., wide median frontal sinus drainage). An anatomic study of cadaver heads was performed to quantify the surprisingly large potential opening and to better understand the pertinent anatomy. This procedure was performed on 10 patients, with no resulting complications and no failure to maintain patency of the frontal sinus drainage throughout the follow-up period (mean, 7 months). We are encouraged by our initial favorable results and intend to use the procedure in the future as needs arise.
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