Table 2.

Histological results with estimation of necrosis on pre-operative imaging by three methods and waiting time between last imaging done and operative intervention

Risk stratification	Classification	HN (%)	Method 1	Method 2	Method 3	WT
Epithelial	Intermediate	0	80	83.3	85	16
Mixed	Intermediate	40	3	2.3	41	27
Mixed	Intermediate	65	10	10.0	5	21
Diffuse anaplasia	High	35	65	56.7	70	24
Regressive	Intermediate	85	2	1.7	94	6
Regressive	Intermediate	90	60	56.7	58	7
Epithelial	Intermediate	10	6	6.0	24	6
Mixed	Intermediate	65	35	33.3	81	1
Stromal	Intermediate	60	70	68.3	14	7
Regressive	Intermediate	80	65	60.0	79	5
Focal anaplasia/mixed	Intermediate	25	85	83.3	57	2
Regressive	Intermediate	80	7.5	8.3	86	2
Blastemal	High	0	5	7.3	−13	5
Blastemal	High	25	35	36.7	71	6
Diffuse anaplasia	High	20	-	-	31	19
Stromal	Intermediate	45	-	-	18	10
Regressive	Intermediate	66	-	-	69	14
Mixed	Intermediate	85	-	-	87	1
Mixed	Intermediate	50	-	-	16	21
Mixed	Intermediate	10	-	-	56	5
Necrotic	Low	100	-	-	94	1
Mixed	Intermediate	80	-	-	93	16
Regressive	Intermediate	97	-	-	77	7
Epithelial	Intermediate	0	-	-	42	20
Mixed	Intermediate	0	-	-	6	25
Stromal	Intermediate	10	-	-	26	12
Regressive	Intermediate	80	-	-	32	17
Blastemal	High	60	-	-	86	5
Stromal	Intermediate	6	-	-	34	5
Regressive	Intermediate	85	-	-	74	15
Necrotic	Low	100	-	-	34	29
Necrotic	Low	100	-	-	93	19
Regressive	Intermediate	85	-	-	56	45

HN: Histological necrosis, WT: Waiting time between last imaging and surgical resection in days