Guerrero AGML, Ortiz MG, Martínez RLW, Cárdenas FF, Ramos MPL, Navarro MRM

Language: Spanish
References: 28
Page: 39-46
PDF size: 171.96 Kb.

ABSTRACT

Introduction: Cranial mucoceles are pseudocystic injuries, described at the beginning of the XIX Century. They are originated in one or several cavities of the paranasal sinuses and their evolution depends on the progressive expansion speed of the involved area. The chronic inflammation of the mucosa is associated with an obstruction of drainages natural routes of the paranasal sinuses.
Radiologycal findings: Typical mucocele is an injury that expands to the paranasal sinus due to an obstruction of its drainage ostium. In mucoceles originated at ethmoid supraorbital recess level, the expansion of the horizontal portio (the ceiling of the orbit), might not be seen through common X-rays, and can extend the injury within the orbit causing ocular proctosis and ophthalmoplegia, that is why this type of mucoceles will have to be better studied with computed tomography (CT). Fronto-ethmoidal mucoceles (80%) are commonly in the anterior groups of ethmoidal cells that in posterior ones and this is the fact that the secondary to anterior ethmoid drainage ostium is smaller than the other drainages of the paranasal sinus. The ethmoidal mucocele is an expansive injury that thins and remodels the papyraceous lamina and exerts that generally mass effect towards the orbit and as a result is also the proctosis of the ocular globe. Maxilar sinus mucoceles (17%) show a complete sinus opacity in their expanded walls. Sphenoidal sinus mucoceles are the less common (3%), of all the paranasal sinus mucoceles.
Conclusions: Computed tomography is ideal to analyze the regional anatomy and extension of the injury. The magnetic resonance is very useful when it is about making a differential diagnosis with malignant injuries or atypical behavior in regard to invasion of critic areas like the orbit and cranial cavity.

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