Table 1.

List of the incidental findings demonstrated on MRI of the SI joints.

Disease
Lumbosacral spine	Degenerative disc of the lower lumbar - lumbosacral spine
	Facet joint arthrosis/arthritis
	Edema pedicle/ spondylolyse with BME
	Lumbosacral transitional variant, with or without BME
	Spina bifida occulta
	Schmorl nodules
Hip joint	Hip fluid (no evidence of synovial proliferation)
	Hip arthritis (evidence of synovial proliferation)
	Hip AVN
	Degenerative hip
Simple cyst	Tarlov cyst
	Ganglion cyst Subchondral cyst
	Bone cyst
BME	Focal bone marrow edema (CRMO/sacroiliitis excluded): aspecific, Posttraumatic or mechanical
	CRMO
Tumor	Benign tumor
	Malignant tumor
Enthesitis/tendinitis	Enthesitis/tendinitis gluteus muscle
	Enthesitis other (not SIJ/not gluteus muscle)
Muscle pathology	Muscle tear
	Myositis
	Muscle strain
Fracture	Old or new
Bony apophyseal avulsion
Ovarian cyst
Other