CT Perfusion in the Characterisation of Renal Lesions: An Added Value to Multiphasic CT
Table 1
Characteristics of patients, renal lesions, and CT examination.
Characteristics
All lesions (% or range)
Clear cell RCC (% or range)
Chromophobe RCC (% or range)
Papillary RCC (% or range)
Oncocytoma (% or range)
patients
41
26*
5
5*
6
Sex
Male
26 (63)
16 (62)
3 (60)
5 (100)
3 (50)
Female
15 (37)
10 (38)
2 (40)
0
3 (50)
Mean age
60.76 (39–86)
65.29 (39–86)
53.4 (39–60)
58.16 (42–63)
64.5 (44–80)
lesions
49
27 (55)
10 (21)
6 (12)
6 (12)
Side
Right
25 (51)
14 (52)
6 (60)
3 (50)
2 (33)
Left
24 (49)
13 (48)
4 (40)
3 (50)
4 (67)
Location
UP
10 (20)
6 (22)
2 (20)
2 (33)
0
UP-MR
5 (10)
3 (11)
1 (10)
0
1 (17)
MR
15 (31)
7 (26)
4 (40)
3 (50)
1 (17)
LP-MR
7 (14)
6 (22)
0
0
1 (17)
LP
12 (25)
5 (19)
3 (30)
1 (17)
3 (49)
Mean lesion diameter (mm)
45.62 (10–128)
51.25 (20–128)
44.2 (10–110)
26.66 (17–40)
48.5 (20–116)
Pathologic tumour stage
T1a
20 (46)
9 (33)
5 (50)
6 (100)
—
T1b
8 (19)
6 (22)
2 (20)
0
—
T2a
2 (5)
0
2 (20)
0
—
T2b
2 (5)
1 (4)
1 (10)
0
—
T3a
8 (19)
8 (30)
0
0
—
T3b
3 (6)
3 (11)
0
0
—
T3c
0
0
0
0
—
T4
0
0
0
0
—
Fuhrman grade
1
4 (12)
3 (11)
—
1 (17)
—
2
21 (64)
17 (63)
—
4 (66)
—
3
6 (18)
5 (19)
—
1 (17)
—
4
2 (6)
2 (7)
—
0
—
MVD
Lesion
439.20 (105–1230)
488.66 (238–1230)
412 (105–769)
256 (108–482)
444.3 (288–492)
Parenchyma
266.97 (71–537)
222.29 (80–238)
506.3 (80–537)
240.16 (71–458)
262.6 (162–322)
Perfusion1 CT study type
Cine
13 (26)
8 (30)
1 (10)
2 (34)
2 (34)
Shuttle
36 (74)
19 (70)
9 (90)
4 (66)
4 (66)
Multiphase CT study type
B-CM-NG-E
40 (82)
22 (81)
8 (80)
4 (66)
6 (100)
B-CM-NG
9 (18)
5 (19)
2 (20)
2 (34)
0
CT characteristics
Hypervascular
25 (51)
17 (63)
2 (20)
2 (34)
4 (66)
H with necrosis
14 (29)
10 (37)
2 (20)
0
2 (34)
Hypovascular
10 (20)
0
6 (60)
4 (40)
0
There were 49 lesions in 41 patients; *one patient had two different histologic types of lesions: one clear cell RCC and one papillary RCC. Oncocytomas were not staged because the staging criteria only applied to RCCs. RCC: renal cell carcinoma; : number; UP: upper pole; MR: mesorenal region; LP: lower pole; MVD: microvascular density; B: baseline phase; CM: corticomedullary phase; NG: nephrographic phase; E: excretory phase; H: hypervascular.
