Time course analyses of structural changes in the infrapatellar fat pad and synovial membrane during inflammation-induced persistent pain development in rat knee joint

Table 1 Semi-quantitative evaluation of structural changes in IFP: Cellularity

Score	0	1	2	3
Perivascular	Normal	Slightly increased	Moderately increased	Markedly increased
IFP body	Normal	Slightly increased	Moderately increased	Markedly increased
IFP surface	≦Single cell layer	2~3 Cell layers	4~5 Cell layers	≧ 6 Cell layers (6 or more)

ISSN: 1471-2474