Læknablaðið - 15.06.2013, Blaðsíða 20

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ENGLISH SUMMARY
Acoustic Neuroma in lceland for 30 years (1979-2009)
GudmundssonThH', Petersen H' 2
Introduction: Acoustic neuroma (AN) is a tumor of the 8th cranial nerve.
The goal of this study was to find the incidence of AN in lceland from
1979 - 2009 as well as investigate other epidemiological factors.
Material and Methods: The group of patients with the AN diagnosis
was gathered retrospectively through medical records. We looked at
several epidemiological factors including age and symptoms at diag-
nosis, and the treatment chosen foreach individual.
Results: The incidence rate of AN in lceland is 1.24/100,000. About 10%
of diagnosed tumors were found incidentally. Most of those were found
in the last 10 years of the investigation and in that period fewer large and
giant tumors at diagnosis. Present complaints of patients at diagnosis
were hearing loss (69%), dysequilibrium/dizziness (47%) and tinnitus
(43%). Treatments were surgery (n=47), observation (n=30) and gamma
knife radiosurgery (n=16). We had information concerning postoperative
hearing loss and facial paralysis in 39 patients who underwent surgery.
Loss of hearing postoperatively occurred in 69% (n=27) and 44% (n=17)
had facial paralysis. For an average of 3.5 years, 17% of tumors followed
by imaging grew.
Conclusion: The incidence of AN is similar to that in Europe and is
increasing. More tumors are found incidentally. Small tumors can be
followed by regular imaging, at least for the short term. Larger tumors
are treated by surgery or gamma knife radiosurgery. A high percentage
of patients receiving surgery lost their hearing postoperatively.
Key words: Acoustic neuroma, acoustic tumor, vestibular schwannoma, acoustic schwannoma
Correspondence: Þorsteinn H. Guðmundsson, thhg86@gmail.com
'Department of Life Sciences, University of lceland, 2Department of Otorhinolaryngology Head and Neck Surgery, Landspítali, Reykjavik, lceland
292 LÆKNAblaðið 2013 /99