Fig. 4From: The choice of endoscopic surgical approach and four steps of operation of inverted papilloma of the maxillary sinusPersistent chronic inflammation in the inferlateral wall at second postoperative 4 months (A), mucosal inflammation gradually improved and mucosal epithelization formed, at third postoperative 2 months (B), 3 months (C), 4 months (D), 12 months (E), and 36 months (F). Figs. 1, 2 and 4 are the same patientBack to article page