18 January 2026
: Case report 
Multi-Pathogen Knee Infection, Including Treponema pallidum and Brucella: A Case Report
Challenging differential diagnosis, Rare disease, Clinical situation which can not be reproduced for ethical reasons
Youhan Yang
ABCDEF 1, Haitao Chen ADEF 1, Yinxian Wen ACDE 1, Qinglong Chai BCE 1, Yi Hua BEF 1, Xu Yang ACDEF 1*, Liaobin Chen ADG 1
DOI: 10.12659/AJCR.950156
Am J Case Rep 2026; 27:e950156
Figure 4 Intraoperative pictures. A substantial quantity of mucus membrane proliferation was observed during the procedure, manifesting as a transformation analogous to that of tree sap.