MRI characteristics and extent of tumor removal in cervical dumbbell-shaped schwannomas

Data of 72 patients who underwent surgical treatment for cervical dumbbell-shaped schwannomas were retrospectively reviewed.

Tumor level (p = 0.009, Pearson’s chi-square test), VA involvement (p < 0.001, linear-by-linear association test), and SI on T2-weighted images (T2-WIs) (p = 0.006, Fisher’s exact test) were statistically significantly different between the GTR and STR groups. Univariate analysis demonstrated that upper level (odds ratio [OR] 4.00, 95% confidence interval [CI] 1.50-10.69; p = 0.006), pushed VA (OR 0.11, 95% CI 0.03-0.45; p = 0.002), encased VA (OR 0.02, 95% CI 0.01-0.14; p < 0.001), and Hyper-SI on T2-WI (OR 12.46, 95% CI 1.49-104.51; p = 0.020) were significant predictors for GTR.