“…Reconstruction of a complex knee defect is challenging, especially when complicated with deep infection such as osteomyelitis (Li, Li, & Tan, 2018; Topalan, Guven, & Demirtas, 2010). Complex knee defect requires not only skin coverage but also secure reconstruction of the knee joint with a strong membranous tissue (Li et al, 2018; Lu, Gong, Cui, & Liu, 2011; Lucattelli, Delcroix, Baldrighi, Tanini, & Innocenti, 2019). When a defect is complicated with osteomyelitis of the patella, artificial materials cannot be used for the knee joint reconstruction, and infection control is needed with sufficient debridement and coverage of the debrided surface with well‐vascularized tissue such as the muscle flap, as antibiotics‐contained bone cement is hardly applicable for the lesion (Knox et al, 2006; Lu et al, 2011; Mayoly et al, 2018; Yamamoto, Saito, Ishiura, & Iida, 2016a).…”