Table 3 NF1 score clinical score for predicting internal neurofibromas in adults
From: Neurofibromatosis 1 French national guidelines based on an extensive literature review since 1966
NF1 score | |
|---|---|
Independent factors associated with the presence of internal NFs | Points |
Age ≤ 30 years | 10 |
Absence of cutaneous NFs | 10 |
≥ 2 subcutaneous NFs | 15 |
<  6 café-au-lait macules | 5 |
Probabilities of the presence of internal neurofibromas according to the NF-1Score | |
 NF1- Score | Probability (%) |
 0 | 5.1 |
 5 | 8.3% |
 10 | 13.3% |
 15 | 20.7% |
 20 | 30.8% |
 25 | 43% |
 30 | 56.1% |
 35 | 68.4% |
 40 | 78.7% |