Fig. 3
From: Procaine and saline have similar effects on articular cartilage and synovium in rat knee
The synovium of knee joints. Slight inflammatory infiltration (arrow) and haemorrhage (asterisk) was observed in the saline group at day 1 and in the procaine-administered group at days 1 and 2. No inflammation was observed in the synovium at days 7, 14 and 21. Synoviocytes surrounding the connective tissue were seen. a–e show saline-administered groups, and f–j show procaine-administered groups. Haematoxylin and eosin, Scale bar: 50 μm