Table 6: Comparison of individual horizontal distance differences of reference points ‘Condyle’ to M-plane (Co-MR minus Co-ML; CoA-M minus CoNA-M) on PA cephalograms in NF1 patients with facial plexiform neurofibroma (FPNF).
All tumor manifestations are unilateral. The diagnostic group is divided into subgroups according to the location of affected branches of the trigeminal nerve.
For the interpretation of the measured values, it is important to consider following definitions:
Difference R_L has a positive value: The right condyle is farther away from the M-plane than the left condyle.
Difference R_L has a negative value: The left condyle is farther away from the M-plane than the right condyle. Right/left distinction was used for measurements of the DNF group.
Difference A_NA is positive: The measuring point of side A (affected side) is farther away from the M-plane than the measuring point of side NA (non-affected).
Difference A_NA is negative: The measuring point of side A (affected side) is closer to the M-plane than the measuring point of side NA (non-affected). The A/NA distinction was used for measurements of the FPNF group.