Kengo Hirota1, Toshiyuki Fujita2, Hiroyuki Akagawa2, Hideaki Onda3, Hidetoshi Kasuya1. 1. Department of Neurosurgery, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawa-ku, Tokyo, 116-8567, Japan. 2. Tokyo Women's Medical University Institute for Integrated Medical Sciences, 8-1 Kawada-cho, Shinjyuku-ku, Tokyo, 162-8666, Japan. 3. Kofu Neurosurgery Hospital, 1-16-18 Sakaori, Kofu, Yamanashi, 400-0805, Japan.
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 cm(3), regressed linearly to less than half, 9.9 cm(3). 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.
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 cm(3), regressed linearly to less than half, 9.9 cm(3). 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.
Authors: João Paulo C de Almeida; Rory J Petteys; Daniel M Sciubba; Gary L Gallia; Henry Brem Journal: J Clin Neurosci Date: 2009-06-26 Impact factor: 1.961