“…The obstruction can result from congenital anomalies, chronic rhinosinusitis, previous radiotherapy and/or surgical treatment, trauma, and sinonasal neoplasms (Johnson & Ferguson, 1998;Maroldi et al, 2005). Moreover, congenital illnesses such as cystic fibrosis and primary ciliary dyskinesia are considered predisposing factors for occurrence of mucoceles (Guttenplan & Wetmore, 1989;Thomé et al, 2000;Nicollas et al, 2006;Olze et al, 2006;. Mucoceles occur more frequently in the fourth and fifth decade of life, with a similar distribution in both sexes.…”