Comparative clinical and genomic analysis of neurofibromatosis type 2-associated cranial and spinal meningiomas.

Median absolute tumor growth rate for cranial tumors was higher (with marginal significance) than for spinal tumors (0.9 cm 3 /year (IQR = 2.4) versus 0.1 cm 3 /year (IQR = 0.2), P = 0.045), while median relative tumor growth rates for cranial and spinal tumors were nearly identical, 49.5 percent/year (IQR = 47.4) versus 50.2 percent/year (IQR = 47.7), P = 0.4 (Table 1 and Fig. 2 ).

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