[Atypical frontal sinus mucocele. A case report]. / Mucocele del seno frontal de presentación atípica. Informe de un caso.

CLINICAL CASE: We report a case of a 46-year-old woman who developed a tender, painful mass in the left superior eyelid over a period of about 6 months. This was a frontal mucocele with atypical clinical and histopathologic features. DISCUSSION: Most mucoceles arise from the frontal or ethmoidal sinuses. Frontal mucoceles usually cause outward and downward displacement of the globe, and are often associated with fullness in the supero-nasal and medial canthal region and a palpable mass.