Adhesive perinephric fat can make partial nephrectomy more difficult to perform. Davidiuk et al developed a score for predicting the probability of adhesive fat. The authors are from the Mayo Clinic in Jacksonville, Rochester and Phoenix.
Patient selection: partial nephrectomy candidate
Parameters:
(1) posterior perinephric fat thickness in cm
(2) stranding on CT or MRI scan (linear area of soft tissue attenuation in the perinephric space)
Parameter
Finding
Points
posterior fat thickness
< 1 cm
0
1 to 1.9 cm
1
>= 2 cm
2
stranding
none
0
Type 1 (mild, thin rim)
2
Type 2 (diffuse, thick-banded)
3
total score =
= SUM(points for the 2 parameters)
Interpretation:
• minimum score: 0
• maximum score: 5
• The higher the score the more likely that adhesive (“sticky”) fat will be encountered.
Score
Probability of Adhesive Perinephric Fat
0
6%
1
16%
2
31%
3
50%
4
86%
5
100%
To read more or access our algorithms and calculators, please log in or register.
