OBJECTIVE. To make the charts of stature and head circumference of Spanish pediatric patients affected with neurofibromatosis type 1 (NF1), to compare them with the ones from a healthy population and to review the possible causes of its alterations.
PATIENTS AND METHODS We obtained the data from 251 Spanish patients (122 women and 129 men) with NF1 seen in seven hospitals between the years 2000 and 2002, with ages between 1 month and 18 years old. The calculation of the 50th centile or median was done using the method of mobile variables, and the 3rd and 97th centiles where calculated from this median.
RESULTS Girls with NF1 have a shorter stature than the healthy ones, which becomes evident after 10 years of age. We have not found differences in the stature between boys with the disease and those without it. In regards to head circumference, in boys and girls we have observed that it is bigger throughout life in patients affected with NF1, and that the 50th centile of healthy people correlates with the 3rd centile of those affected, the 97th centile of the healthy ones with the 50th centile of those affected, being the 3rd centile of the healthy people well below the 3rd centile of the affected ones, and the 97th centile of the affected ones well above the 97th of the healthy people. Conclusions. The short stature in postpuberal girls and the macrocephaly in both sexes at all ages, are primary characteristics in the NF1 and they are not usually related with other alterations, although they are not specific for this illness.
KeywordsGrowth in the NF1 populationHead circumference in NF1Height in NF1Neurofibromatosis type 1
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