{'fraction_non_alphanumeric': 0.0183585313174946, 'fraction_numerical': 0.011879049676025918, 'mean_word_length': 5.3493150684931505, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Management of endoscopic sinus surgery failures

Endoscopic sinus surgery is successful in 75 to 95% of patients with medically refractory chronic rhinosinusitis. Failure occurs in 5 to 25% of patients, and about 10 to 15% of ESS patients require revision surgery. These are patients without polypoid chronic rhinosinusitis. The polypoid rhinosinusitis group has much more of a tendency to require revision or repeat surgery than the nonpolypoid group. Underlying problems must be treated in this group, which may salvage the previous operative procedure. A thorough history, endoscopic physical examination, and radiologic evaluation provide the database for accurate diagnosis of the reasons for failure. If the patient requires revision surgery, the most common anatomic sites related to failure are known and corrective surgery can be planned. Computer-guided endoscopic sinus surgery may be helpful in this patient group.