“…1,3 The majority of children who have inherited NF-1 from an affected parent can be identified in infancy because the diagnosis requires only one clinical sign in addition to the positive family history. 3 Perinatal NF-1 may present clinically in extraordinary ways: congenital stridor resulting from a laryngeal tumor 11,36 ; airway obstruction from tracheal compression 14,22 ; as part of a ''congenital neurocristopathy'' occurring together with neuroblastoma, Schwannoma, and plexiform neurofibroma 6,10,12,13,15,22,28 (Fig. 2); congenital buphthalmos, proptosis, and glaucoma secondary to orbital NFA 17,18,20,22,26,27,30,33,35 ; progressive respiratory compromise resulting from rapidly growing NFAs in the tongue, oral cavity, neck 14,19,22,26 ; a vascular malformation 34 ; fetal hydrops following compression of neck vessels or vena cava by tumor.…”