The mucoceles are inflammation of the paranasal sinuses. Secretion is produced by a weight loss with increasing pressure and progressive destruction of the bone walls. Rated inflammatory tumors within the group. When it is called sobreinfect mucopiocele. Male patient of 10 years of age, coming from rural areas to consult our service for optional reference to a tumor of the right nasal cavity and hypertelorism. As part of 5 years of progressive development of hypertelorism, clear rhinorrhea from the right side and then yellow, nasal obstruction ipsilateral to start flashing and then continues. On physical examination. For rhinoscopy: FDN: gray tumor in the nasal cavity, smooth and comes to the vestibule, septum shifted to the left. FNI: mucous pink partition moved to the left, the turbinate normotrofic, not displayed lesion. Eyes: hypertelorism importantly, preserved mobility, pupils equal and reactive. Nasofibroscopy gray tumor that fills the FDN that comes from the ethmoidal region. Computerized tomography is verified pansinusitis and resonance is evident the nature of these liquid. Endoscopic sinus surgery is performed where it notes cornet average disturbance in the right nasal cavity and the mere contact breaks with purulent thick liquid output at all sines sinuses, with communication of all wells (auto tank). Pathological anatomy informs respiratory mucous with acute and chronic infiltrate and fibrin-clot red blood cells. Definitive diagnosis: mucopioce fronto-ethmoidal maxillary forming a single cavity.