{"id":"3facfa81-a535-4d0c-9f53-d289aaf6486f","slug":"spontaneous-regression-together-with-increased-calcification-of-incidental-meningioma","title":"Spontaneous regression together with increased calcification of incidental meningioma","authors":["Kengo Hirota","Toshiyuki Fujita","Hiroyuki Akagawa","Hideaki Onda","Hidetoshi Kasuya"],"abstract":"Background: Regression of meningioma has been reported after hemorrhage or hormonal withdrawal. However, meningioma regression is rarely observed spontaneously. Case Description: A right falx meningioma was incidentally diagnosed and was followed at every one-year by magnetic resonance imaging (MRI) for over 7 years. The tumor, with a maximum diameter of 4 cm, showed a slightly high density and was enhanced on computed tomography (CT), and a high intensity with a low-intensity core on T2 MRI, with significant edema. The meningioma gradually shrank together with a decrease of edema and increase of calcification. The initial volume, 25.5 cm3, regressed linearly to less than half, 9.9 cm3. Conclusion: Here, we report a case of an incidentally diagnosed meningioma that regressed spontaneously. The pattern of the regression was similar to that following gamma knife radiosurgery.","thumbnailUrl":"https://sni-digital-videos.s3.amazonaws.com/articles/3facfa81-a535-4d0c-9f53-d289aaf6486f/featured/hero-1782420930873.png","publishDate":"2014-05-21T00:00:00.000Z","doi":"10.4103/2152-7806.132957","categories":["Original Article"],"fullTextUrl":"https://surgicalneurologyint.com/wp-content/uploads/2015/05/3968/SNI-5-73.pdf"}