RT Book, Section
A1 Wells, Robert G.
SR Print(0)
ID 1148953394
T1 Systemic Arthritis
T2 Diagnostic Imaging of Infants and Children
YR 2015
FD 2015
PB McGraw-Hill Education
PP New York, NY
SN 9780071808392
LK accesspediatrics.mhmedical.com/content.aspx?aid=1148953394
RD 2024/04/19
AB Juvenile  idiopathic  arthritis  (JIA;  juvenile  rheumatoid  arthritis)  encompasses  a  group  of  disorders  that  are  clinically  characterized  by  a  chronic  synovitis  of  unknown  origin  that  begins  when  the  patient  is  less  than  16  years  of  age,  and  persists  for  more  than  6  weeks.  Subgroups  of  JIA  include  pauciarticular  (4  or  fewer  joints  involved),  polyarticular  (5  or  more  joints),  and  systemic-onset  varieties.  Synovial  inflammation  in  these  patients  stimulates  synovial  proliferation  and  joint  effusion.  Pannus  formation  in  the  synovium  can  lead  to  erosion  of  cartilage  and  bone.1