Table 16: Comparison of sella turcica area in patients with NF1 (PNF or DCNF) and controls. All individuals are aged 18 years or more. PNF group was subdivided in two groups: ‘Upper facial region’ group in the context of this analysis includes all patients who are affected in the first, the second, the first and second or all three trigeminal nerve branches. ‘Lower facial region’ group includes all patients who have developed a PNF confined to the third or second and third trigeminal nerve branch(es). Table (A) describes characteristics of groups and (B) illustrates pairwise comparison of groups.