“…In our study, the AICA had a caliber of 1.02 mm, i.e., near to the lower limit of the 1-1.37 mm range reported by other authors [1,5,7,15], whereas the caliber of the PICA of 1.45 mm measured in our series is in the middle segment of the de 1.2-1.84 mm range reported in previous studies [1,7,8,15]. Agenesis of the AICA is an anatomical expression reported in a significant number of specimens both in our work (16.1%) and in previous studies; for the AICA a figure of 2-36.1% has been reported [1,5,15,16,17]. The agenesis of the PICA observed in the present study (7.5%) is slightly lower than what has been reported in other population groups, within a range of 9.6-38.4% [1,5,15,16,17,20].…”