Similarly, Khan et al conducted a retrospective study encompassing 80 patients with closed humeral shaft fractures; they found out the prevalence of RNP was around 8.75% (7/80), with most fractures spiral.16In our study, we did find differences regarding fracture comminution between RNP and non-palsy group and these findings suggest that medial-sided comminution could be risk factor for RNP. Here, RNPC3 is linked to palsy.