Andtbacka et al developed a simple score for estimating the probability that a nonsentinel lymph node will contain metatastic melanoma in a patient with a positive sentinel lymph node. The authors are from M.D. Anderson Cancer Center in Houston.
Parameters:
(1) Breslow thickness of the primary tumor in mm
(2) largest metastatic focus in mm in a sentinel lymph node
Parameter
Finding
Points
Breslow thickness
<= 2.0 mm
0
> 2.0 mm
1
largest focus in mm
<= 0.5 mm
0
0.51 to 2.0 mm
1
2.01 to 10 mm
2
> 10 mm
3
score =
= SUM(points for both parameters)
Interpretation:
• minimum score: 0
• maximum score: 4
• The higher the score the higher the probability that a nonsentinel lymph node will contain metastatic melanoma.
Total Score
Probability Metastasis Found in Nonsentinel Node
0
0%
1
8%
2 or 3
20%
4
50%
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