Table 2.

Association between Intratumoral Signal Intensity and Ki-67.

Intratumoral signal intensity	Ki-67 (%)	Suggested model	Ki-67 (%)	Low proliferation group	High proliferation group
Category 1: Low or equal T2	12.5 ± 14.3 (1–80)	Grade I: Low or equal T2	12.5 ± 14.3 (1–80)	67 (69.1)	30 (30.9)
Category 2: High T2	20.0 ± 17.0 (1–80)	Grade II: High T2 or necrosis < 50%	17.6 ± 15.4 (1–80)	45 (52.3)	41 (47.7)
Category 3: Necrosis < 50%	16.0 ± 14.1 (1–70)
Category 4: Necrosis ≥ 50%	45.0 ± 23.8 (20–70)	Grade III: Necrosis ≥ 50%	45.0 ± 23.8 (20–70)	0 (0.0)	4 (100.0)

Note. Values are mean ± standard deviation (ranges) or number of patients (%).

Definition of necrosis = very high T2 signal intensity and no enhancement.

Grade II = combination of Category 2 and 3.

Low proliferation group = Ki-67 < 14%. High proliferation group = Ki-67 ≥ 14%.