The original tumor and 4 relapses of a recurrent meningioma were studied. We analyzed and compared these recurrences by histopathology, PCNA labelling index (PCNA-LI), nuclear count, and cytogenetical findings. The most important changes in the evolution to aggressivity were: recurrences at progressively shorter intervals, increases in the PCNA-LI, and micronecrosis; histological changes such as sheeting and increase of the extracellular matrix and a gradual transformation to a clonally complex karyotype.
机构:
Hop La Pitie Salpetriere, AP HP, Dept Neurol Mazarin, Paris, France
Univ Paris 06, Dept Neurol, Paris, FranceUniv Lille, PRISM Inserm U1191, Villeneuve Dascq, France
Taillibert, S.
Chamberlain, M. C.
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机构:
Univ Washington, Dept Neurol & Neurol Surg, Seattle, WA 98195 USAUniv Lille, PRISM Inserm U1191, Villeneuve Dascq, France