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  • Title: Disappearance of arachnoid cysts after head injury.
    Author: Mori T, Fujimoto M, Sakae K, Sakakibara T, Shin H, Yamaki T, Ueda S.
    Journal: Neurosurgery; 1995 May; 36(5):938-41; discussion 941-2. PubMed ID: 7791985.
    Abstract:
    The mechanism of the disappearance of arachnoid cysts is not fully understood. This article discusses the spontaneous disappearance of these cysts after head injury. Five patients underwent computed tomography and were diagnosed as having a subdural hematoma or effusion associated with arachnoid cysts. In four of the five patients, the cyst decreased in size or disappeared. These cases suggest a possible mechanism by which this type of cyst associated with subdural hematoma or effusion might disappear. For the arachnoid cyst to disappear, the rupture of the cyst wall appears to be essential, and after rupture, subdural effusion must develop around the cyst. As this effusion is absorbed, the fluid in the cyst drains away, after which the cyst becomes smaller and gradually disappears. This hypothesis supports the possibility of a "natural cure" for arachnoid cysts without surgical intervention.
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