A case of ruptured Baker's cyst induced by nivolumab and ipilimumab

Abstract

Here, we presented the rare case of ruptured Baker's cyst induced by immune checkpoint inhibitors (ICIs). The history of more than one immune-related adverse event (irAE) like our case was reported to be associated with a more persistent course of arthritis. Mild persistent inflammation without subjective symptoms might exist after first ICI therapy followed by ruptured Baker's cyst. It is important to pay attention to potential musculoskeletal irAEs in ICI-treated patients with multiple irAEs.