Volume 2, Issue 3, Pages 101-104 (September 2016) Chondrogenesis in the synovial tissue is associated with the onset of pseudogout after total knee arthroplasty  Ryosuke Sato, MD, Shunji Nakano, MD, PhD, Tomoya Takasago, MD, Masaru Nakamura, MD, Masahiro Kashima, MD, Takashi Chikawa, MD, PhD, Daisuke Hamada, MD, PhD, Tomohiro Goto, MD, PhD, Koichi Sairyo, MD, PhD  Arthroplasty Today  Volume 2, Issue 3, Pages 101-104 (September 2016) DOI: 10.1016/j.artd.2015.10.007 Copyright © 2015 The Authors Terms and Conditions

Figure 1 Plain radiographs of the affected knee (a) before TKA, (b) after TKA, and (c) during the occurrence of pseudogout. Arthroplasty Today 2016 2, 101-104DOI: (10.1016/j.artd.2015.10.007) Copyright © 2015 The Authors Terms and Conditions

Figure 2 Intraoperative findings at the pseudogout attack. Arthroplasty Today 2016 2, 101-104DOI: (10.1016/j.artd.2015.10.007) Copyright © 2015 The Authors Terms and Conditions

Figure 3 Findings of the histologic examination of synovial tissue after the onset of pseudogout. (a, c) Hematoxylin-eosin (H&E)–stained section at low magnification. (b, e, f) H&E-stained section at higher magnification. (d) Alcian blue–stained section with the lesion shown in panel c at low magnification. (e) The black-boxed area from panel c, wherein the black arrowhead indicates CPPD deposits in the chondrogenic lesion. (f) The white-boxed area from panel c, wherein the white arrowhead indicates CPPD synthesis in the chondrocytes. Arthroplasty Today 2016 2, 101-104DOI: (10.1016/j.artd.2015.10.007) Copyright © 2015 The Authors Terms and Conditions

Figure 4 Changes in the C-reactive protein (CRP) level and white blood cell (WBC) count after the onset of pseudogout after TKA. Arthroplasty Today 2016 2, 101-104DOI: (10.1016/j.artd.2015.10.007) Copyright © 2015 The Authors Terms and Conditions