TABLE 3:

Growth rates determined from Bayesian measurements of tumor size in 38 patients who underwent serial MR imaging

Rate of GrowthSignificance Level 1ςSignificance Level 3ς
No. with GrowthVolume Doubling Time <1 y/<2 y/>2 yNo. with Growth (3ς)Volume Doubling Time(3ς) <1 y/<2 y/>2 y
Significant growth197/7/5126/5/1
“No growth”130/0/13241/2/21
Significant shrinkage60/0/620/0/2
  • Note.—Data show the number of vestibular schwannomas demonstrating measurable growth greater than the estimated measurement error of 70 mm3 (1ς) and 3 times the measurement error (3ς). Measurements at 1ς indicate possible growth and measurements at 3ς indicate definite growth.