ABSTRACT
Inverted papillomas (IP) are considered benign lesions with a prevalence up to 4% among all sinunasal tumors; however, invasive growth and varying tendency for malignization are reported in literature. We report the case of a 69-year-old woman suffering from a large, aggressively growing IP invading the orbit, skull base, and frontal lobe of the brain. Within only 3 months' time the papilloma showed transformation into an invasive carcinoma, leaving surgical therapy in vain due to explosive recurrence. Intracranial and intraorbital expansion by IP is possible despite histology not showing signs of malignancy initially. In “regular” IP close endoscopic follow-up is mandatory to not overlook recurrence harboring malignancy.
KEYWORDS
Inverted papilloma - endoscopic surgery - rapid malignization - intracranial involvement
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Peter Valentin TomazicM.D.
ENT-University Hospital Graz, Medical University Graz
Auenbruggerplatz 26/28, 8036 Graz, Austria
Email: peter.tomazic@medunigraz.at