Neurofibromatosis type 1 Criteria : Mnemonic

Mnemonic: 2 out of ABCDEFG


1. Axillary or inguinal freckling

2. Bone lesions (sphenoid dysplasia, tibial pseudoarthrosis)

3. Cafe au lait macules/spots (>/= 6 in number; >/= 5 mm in prepubertal and >/= 15 mm in postpubertal)

4. Dermatologic neurofibroma

5. Eye hamartomas/Lisch nodules >/= 2

6. Family history (first degree relative)

7. Glioma of optic nerve

The diagnosis of NF1 requires atleast 2 of 7 NIH criteria.

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