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Why do meningiomas grow during pregnancy?
Date:11/20/2012

nancy or within eight days after delivery. The most common symptoms of enlarging meningioma were changes in vision and facial paralysis or other cranial nerve palsies.

Most of the tumors were located in the skull base region and were typical, "low-grade" benign tumors. At surgery, the tumors showed an unusual "hypervascular" pattern, which was not seen in other cases of meningioma in non-pregnant patients. There was also a high rate of edema (swelling) in and around the tumor.

These and other findings strongly suggested that the rapid tumor growth resulted from "potentially reversible hemodynamic changes"changes in blood flowrelated to pregnancy. The pattern did not support the theory that meningioma growth resulted from "hormone-induced cellular proliferation."

The results may help to explain the uncommon but well-documented occurrence of rapid meningioma growth during pregnancy. Since most meningiomas don't cause any symptoms, they may go undetected. Even if they are detected, they may require no treatment unless they grow.

Together with previous evidence, the findings may have implications for the management of meningiomas in women of child-bearing age. Dr. Lusis and coauthors write, "[F]or the vast majority of women of child bearing age, we would not consider the presence of residual or unresected meningioma to be a contraindication to pregnancy." In contrast, for patients with evidence of tumor growth or swelling, the authors suggest they might consider treating the tumor before pregnancy.


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Contact: Connie Hughes
Connie.Hughes@wolterskluwer.com
646-674-6348
Wolters Kluwer Health
Source:Eurekalert

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