Endoscopic techniques are currently the approach of choice for the treatment of such tumours of the sinonasal cavity and pterygomaxillary and infratemporal regions. The size of the lesion did not contraindicate endoscopic sinonasal surgery as a curative treatment.

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Recurrence occurred in 4 of the 34 patients who underwent EMM (11.8%; 95% confidence intervals (CI) = 39 at 26%) and in 8 of the 18 patients treated using non-endoscopic techniques (44.4%; 95% CI = 23.2 at 67.3%). There was a statistically significant difference (p < 0.05) between treatments, assessed by Kaplan-Meier estimator and log-rank testing. Of the 12 patients who suffered a recurrence, 6 (50%) were treated with endoscopic surgery, 4 (33%) with mediofacial degloving and 2 (17%) were merely followed up; no malignant degeneration occurred.

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