One year has been passed away, my lower back and buttock pain pain very severe , i have done all test
HLAB27
MRI of SI JOINTS LAST YEAR
BONE SCINTIGRAPHY LAST YEAR
ESR EVERY MONTH NORMAL
CRP EVERY MONTH NORMAL
CPK
ANA
ANTI CCP
RA
Above all reports are normal and repeated several time
Should I repeat MRI to rule out AS