Table 1 Patient’s characteristics.

Patient	Age	Sex (M/F)	True false aneurysm	Size (mm)	Symptoms /signs	Location (artery)	Access site	N° outflow vessels	Embolization techniques	Complications		Follow-up (months)
Patient	Age	Sex (M/F)	True false aneurysm	Size (mm)	Symptoms /signs	Location (artery)	Access site	N° outflow vessels	Embolization techniques	Peri-procedural	Post-procedural	Follow-up (months)
1	68	M	T	88 × 140	None	Splenic	RF	4	Coils, Plug	None	None	48
2	74	M	T	63 × 55	None	Splenic	RF	3	Coils, Plug	None	Splenic abscess	72
3	27	M	T	52 × 70	Abdominal pain^a	Splenic	RF	3	Coils, teflon wire pieces, Glue, Plug	None	Splenic infarction	72
4	69	M	T	100 × 40	Abdominal pain^a	Hepatic	RF	4	Onyx, Teflon wire, Amplatzer Plug	None	None	48
5	49	M	T	56 × 30	Jaundice^d	Hepatic	RF	2	Peripheral occlusion device (POD)	None	None	12
6	63	M	T	43 × 52	Back pain^b	Hepatic	RF	1	Covered stent	None	None	84
7	65	M	T	95 × 36	Abdominal pain^a	Splenic	LA	1	Covered stent (3)	None	None	12
8	36	F	F	59 × 33	Intermittent UGIB^d	Left gastric	RF	2	Coils	None	None	18
9	69	M	T	130 × 35	Abdominal pain^a	Hepatic	RF	4	Coils, POD, plug	None	None	6
10	73	M	F	60 × 42	Intermittent UGIB^d	Splenic	RF	1	Covered stent (2)	None	None	24
11	71	M	T	55 × 45	Contained rupture	Splenic	RF	3	Coils, onyx, teflon wire	Acute rupture	Open surgery	15 days death

M: male, F: Female, T: true, F: False, RF: right femoral, LA: left axillary.
^aAbdominal pain: patients presented with abdominal discomfort and pain, probably due to the large dimension of the aneurysm. After the endovascular embolization, a relieve of the pain was obtained in all patients.
^bBack lumbar Pain: probably due to the compression of the celiac plexus. When patients presented with pain it was referred to the aneurysm after excluding other possible causes.
^cJaundice: due to the extrinsic compression of the main biliary duct with dilatation of the intrahepatic ducts. The patient was treated with a percutaneous biliary drainage and, subsequently, with an endovascular embolization obtaining a rapid decompression because of an aneurysm shrunk.
^dIntermittent Upper Gastrointestinal Bleeding – UGIB: both patients had pseudo-aneurysmatic lesions presenting with moderate anemia resulting from slow bleeding arising from the gastric wall in contact with the pseudoaneurysm. The lesions were detected at the CTA, requested after endoscopic examination.

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