Table 6. Failures and adverse events.

Type	Patient #	SIR grade	Age	Sex	Stratifi-cation	Group	Operator	Type of gesture	Comment
Adverse event	#3	B	54	F	Difficult	CT	Resident	Biopsy	The patient had a periadrenal hematoma after a biopsy, without complication or need for additional treatment.
Failure	#37	-	33	M	Difficult	CT	Senior	Biopsy	The patient had a 13 mm suspicious lung nodule, located behind a rib. The operator made two unsuccessful attempts to reach the target, and finally decided to stop the CT-guided intervention. The patient was subsequently referred for surgery.
Failure	#45	-	58	M	Difficult	NAV	Senior	RF Ablation	The patient was referred for RF ablation of a liver metastasis of a colon cancer. At the end of the intervention, the operator was retrospectively not completely sure that the ablated zone had been ideally located, he therefore preferred to register the result as a potential failure, and to plan a strict follow-up. Finally, no local recurrence was observed during the 25 month follow-up of this patient.
Adverse event	#51	B	24	M	Difficult	NAV	Senior	Drainage	24h after a peritoneal drainage, the patient reported abdominal pain and was successfully treated with analgesics.
Failure Adverse event	#84	C	69	M	Easy	NAV	Senior	Biopsy	The patient was referred for a lung nodule biopsy. He presented a pneumothorax during needle progression and the operator decided to interrupt the intervention before the biopsy could be performed. A puncture and aspiration with a chest tube were necessary.
Adverse event	#111	E	34	F	Difficult	NAV	Senior	RF Ablation	After hepatic tumor ablation using radiofrequency, the patient presented a pneumothorax, which required surveillance, and a severe right thigh skin injury beneath a misplaced radiofrequency ground pad.