Table 4

 Incidence rates of subsequent complications in 55 children presenting with one or two complications (group C)

Incidence rate/
100 person-years (n)
Optic pathway glioma0.3 (1)
Plexiform neurofibroma 0.3 (1)
Severe scoliosis0.3 (1)
Atlantoaxial dislocation0.3 (1)
Endocrinological disorder0.9 (3)
Malignancy0.9 (3)