Extra-spinal incidental findings at lumbar spine MRI in the general population: a large cohort study

Insights into Imaging

Table 3 Detection of lumbar spine MRI IF with a standard and a structured reporting approach

		Radiological Report	Structured report	Undetected findings	Non-detection
Organ/system	Finding	Patients (n)	Patients (n)	Patients (n)	rate
C-RADS E2: clinically unimportant findings—no further work-up indicated
Vascular system	Atheromasic plaque	0	11	11	1
Vascular system	Pelvic varicocele	6	21	15	0.71
A	Cystic Lesion	30	732	702	0.96
A	Lithiasis	1	2	1	0.50
Uterus	Solid benign lesion	52	219	167	0.76
	Cystic benign lesion	22	117	95	0.81
	Anatomic abnormality	3	12	9	0.75
Ovaries	Cystic Lesion	23	221	198	0.90
Ovaries	Post-surgery	0	1	1	1
Prostate	Post-surgery	3	15	12	0.80
Bladder
Bowel	Diverticulosis	21	351	330	0.94
Liver	Simple cysts	0	6	6	1.00
	Biliary Lithiasis	1	6	5	0.83
	Biliary duct dilation (< 6 mm)	0	5	5	1
Spleen	Accessory spleen	0	2	2	1
Total E2		162	1,721	1,559	0.91
C-RADS E3: likely unimportant findings, incompletely characterised
Vascular system	Aortic dilation	1	11	10	0.91
Kidney	Hydronephrosis	1	4	3	0.75
Kidney	Solid lesion	2	4	2	0.50
Uterus	Uterine cavity dilation	4	15	11	0.73
Liver	T2 hyperintense lesion	3	27	24	0.89
Fluid	Abdominal-Pelvic Fluid	36	204	168	0.82
Total E3		47	265	218	0.82
C-RADS E4: potentially important findings
Vascular system	Aortic aneurysms	1	11	10	0.91
Lymphatic system	Enlarged lymph nodes	2	38	36	0.95
Uterus	Uterine solid lesion	0	2	2	1
Prostate	Bladder wall thickening or prostatic lesion	2	15	13	0.87
Bladder
Bowel	Colo-rectal wall thickening	3	7	4	0.57
Adrenal glands	Solid lesion	0	1	1	1
Total E4		8	74	66	0.89
Total		217	2,060	1,843	0.90