Magnetic resonance imaging features of minimal-fat angiomyolipoma and causes of preoperative misdiagnosis

Table 1 General patient information

Number	Age	Sex	Maximum diameter	Preoperative diagnosis	Shape	Manifestations
1	65	Male	31	The nodule in the right kidney was rich in blood supply with lipids and capsules, indicating the possibility of a malignant tumor, with renal carcinoma (clear cell carcinoma) being most likely	Circular-like	None
2	64	Male	15	The nodule in the right kidney was rich in blood supply with lipids, which indicated the possibility of renal cancer, not excluding angiomyolipoma	Oval	None
3	63	Female	16	The nodules in posterior portions of the upper pole of the right kidney and the upper pole of the left kidney were rich in blood supply, indicating the possibility of malignant tumors, with renal carcinoma (clear cell carcinoma) being most likely	Oval	None
4	28	Male	47	A cystic, solid, space occupying mass was observed in the left kidney, indicating the possibility of a malignant tumor, with renal cancer being most likely. Surgical consultation was recommended	Circular-like	None
5	52	Female	11	The nodule in the left kidney was rich in blood supply, indicating the possibility of clear cell carcinoma, not excluding angiomyolipoma	Oval	None
6	54	Male	17	The nodule in the right kidney contained lipids and blood supply, indicating the possibility of a malignant tumor, with renal cancer being most likely	Oval	None
7	33	Male	46	The mass in the left kidney was rich in blood supply and contained lipids, indicating the possibility of a malignant tumor, with renal carcinoma being most likely	Circular-like	None
8	61	Female	21	The nodule in the left kidney was rich in blood supply, indicating the possibility of a malignant tumor, with renal cancer being most likely; a fat embolism had formed in the intrahepatic segment of the inferior vena cava and right renal vein	Circular-like	Superior vena cava and right renal vein fat embolus
9	48	Female	13	The nodule in the right kidney was rich in blood supply and contained lipids, indicating the possibility of a malignant tumor, with renal cancer (clear cell carcinoma) being most likely	Oval	None
10	34	Female	36	The mass in the left kidney was rich in blood supply, indicating the possibility of a malignant tumor, with renal cancer (clear cell carcinoma) being most likely	Oval	None