NF I ( Mutation of chromosome 17)
Presence of 2 or more of the following
1. Six or more Cafe-au-Lait Spots of
>5mm in pre pubertal age group
>15 mm in post pubertal age group
2. Two or more neurofibromas of any type or 1 plexiform neurofibroma
3. Freckling in axillary or Inguinal regions
4. Optic gliomas
5. Two or more Lisch nodules ( Slit lamp examination)
6. A distinctive ossesous lesion like Sphenoid dysplasia, Thinning of long bone cortex with or without pseudoarthrosis
7. A parent or sibling or child with NFI according to above criteria
