EUS-guided RFA for Solid Abdominal Neoplasms

Not Applicable

Recruiting

Brief Summary: Radiofrequency ablation has been used for treatment of solid neoplasms of the liver, lung, kidney and adrenal. Recently, EUS-guided RFA has become available and the device allows EUS-guided treatment of solid abdominal neoplasms. The procedure has been shown to be feasible in the porcine pancreas and was used to treat small groups of patients that are not suitable for surgery suffering from pancreatic cancers.

The aim of the current study is to perform a multi-center prospective study on EUS-guided radiofrequency ablation (RFA) of solid abdominal neoplasms. The hypothesis is that EUS-guided RFA is safe, feasible and effective for treating solid abdominal neoplasms.

Detailed Description: RFA causes tissue destruction through the application of a high frequency alternating current, generating local temperatures above 60°C and leading to coagulative necrosis. The technique has been widely used in many solid organ tumours and has been shown to result in 5-year survival rates comparable to surgery. The technique is currently the standard therapy in hepatocellular carcinoma and colorectal pulmonary metastasis particular in patients that are not suitable for surgery.

The current study would be a multi-center prospective study involving four high volume international institutions. Consecutive patients suffering from solid neoplasms of the liver, stomach and adrenals would be recruited. EUS-guided RFA would be performed using a 19-gauge RFA electrode and a VIVA RF generator (STARmed, Korea). The primary outcome would be the overall adverse events rate. Secondary outcomes include mortality, technical success rate, completion ablation rate, 1 \& 3 year overall and disease-free survival.

Recruitment & Eligibility

Inclusion Criteria

Age 18 years-old or above
Suffering from solid neoplasms of the stomach, liver, kidney or adrenals (<5cm in largest diameter) that is indicated for treatment.
Unsuitable for surgery, due to one (or more) of the following items:
- ASA score > II*
- An alternative advanced malignancy
- Unsuitable for surgery upon expert's opinion for any other reason
Healthy individuals who are not keen for surgical resection
Eligible for endoscopic intervention
Written informed consent

Exclusion Criteria

Coagulopathy (international normalized ratio >1.3, partial thromboplastin time greater than twice that of control), platelet count <50,000x103/uL
Pregnancy
Patients with a poor mental condition or mental retardation, unable to understand the nature and possible consequences of the study
Patients unwilling to undergo follow-up assessments
Patients with liver cirrhosis, portal hypertension and/or gastric varices.

Arm && Interventions

Group	Intervention	Description
EUS-guided RFA	EUS-guided RFA	EUS-guided RFA would be performed using a 19-gauge RFA electrode and a VIVA RF generator (STARmed, Korea).

Primary Outcome Measures

Name	Time	Method
Severe adverse events	30 days	Adverse events specific to RFA would be graded according to the lexicon of endoscopic adverse events 24. Potential adverse events specific to RFA include: post-RFA syndrome, pancreatitis, pancreatic leak and thermal injury.

Secondary Outcome Measures

Name	Time	Method
Radiological response	1 year	Based on a modified RECIST criterion
Number of re-interventions	1 year	The number of re-interventions after RFA
Procedural times	1 day	Duration of the procedure
Hospital stay	30 days	Duration of hospital stay after the procedure
Technical success rates	1 week	defined as successful puncture of the lesion with the RFA needle and completion of the ablation cycle.
Survival	3 years	The duration of survival after the procedure

Locations (1): Department of Surgery, Prince of Wales Hospital
🇭🇰
Hong Kong, Hong Kong

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