Please help! what is the infant mortality rate of neurofibromatosis 1?

Depends amt. of nf: Congenital generalized (disseminated) neurofibromatosis (detected prenatally) is associated with a poor prognosis, with a mortality rate of 92%. Survival rates for patients detected before and after birth were 28% and 62%.However most cases of nf are focal and not disseminated without evidence of increased infantile mortality rate. In people with nf the overall decrease in life span is about 8 yrs.