Alexander Katzarov, MD, PhD

Assistant Professor in Clinic of Gastroenterology and Hepatology at the Military Medical Academy Sofia

Local ablation is a minimally invasive procedure, which allows destruction of pathological lesions located in different organs. This can be achieved with chemical or thermal methods. Today the two widely used techniques for ablation are radiofrequency and microwave. The principle of action is different between the two methods, but the main goal is the same rising in temperature of the targeted lesion which leads to protein denaturation and cell death.

Although surgical resection remains the gold standard for treatment of liver lesions ablations is effective in selective cases not suitable for surgery. Candidates for the manipulation are high risk patients not suitable for surgery with local disease confined to the liver without extrahepatic lesions and low tumor volume. In patients conducting chemotherapy ablation is a complementary modality and is necessary because of statistically significant prolongation in life expectancy.


Alexander Krumov Katzarov graduated Medical university of Sofia in 2008. At present he is an Assistant Professor in Clinic of Gastroenterology and Hepatology at the Military Medical Academy Sofia.

In 2014 Dr Katzarov acquired his doctoral degree on the topic “Complications after endoscopic manipulations and their management.” He is fully trained in diagnostic, invasive endoscopy and diagnostic and therapeutic ultrasound manipulations. Member of the Bulgarian Society of Gastroenterology, American and European endoscopic associations. Specialized invasive endoscopy in France and Norway, where he acquired the certificates of the European Society of Gastrointestinal Endoscopy (ESGE). In 2019, he had a two-month training course in the Gastroenterological Clinic at the University Hospital in Florida USA.

Since 2017 he is the Bulgarian representative in the National Societies forum organized by The United European Gastroenterology Association (UEG), where he was elected as a representative of the meeting of the Board of Directors of the Association. He has numerous publications in Bulgarian and foreign literary journals. Co-author of textbooks in Bulgaria and abroad.