Table 1

Diagnostic criteria for type 1 neurofibromatosis. Two or more of the following criteria are required for diagnosis

Six or more café au lait spots
Two or more neurofibromas
One plexiform neurofibroma
Freckling in the axilla or groins
Optic glioma
Two or more Lisch nodules
Presence of a distinct osseous lesion, eg sphenoid wing dysplasia or thinning of a long bone cortex with or without pseudoarthrosis
A first degree relative who meets the above criteria for NF1