** Medical device maker Autonomix Medical's shares more than double to $21.07, highest since July ** Company says its radiofrequency ablation procedure reduced pain in patients with pancreatic cancer

** Says all patients who responded to the procedure went to zero opioid use at 4-6 weeks post procedure

** Radiofrequency ablation is a minimally invasive procedure that uses radio waves to destroy abnormal cells or tissue and treat pain

** As of last close, stock down 92.4% since its IPO in January

(Reporting by Christy Santhosh) ((mailto:Christy.Santhosh@thomsonreuters.com))