As in Cases #4 and #5, brachial plexus neuritis after PD-1 antibody treatment was reported in one patient after nine infusions of pembrolizumab, and in another patient after nine infusions of nivolumab both with a rebound of symptoms when weaned from corticosteroids and with a rapid response to corticosteroids and a full regaining of function [35]. This evidence concerns the gene PDCD1 and brachial plexus neuritis.