Abstract (other lang.): Radiofrequency ablation (RFA) stands out as a minimally invasive ablative technique with significant potential in veterinary oncology. This doctoral thesis examines its efficacy, safety, and clinical applicability, focusing on specific neoplasms such as insulinomas, chemodectomas, nasal carcinomas, and pheochromocytomas. Across four scientific articles, this research demonstrates RFA's ability to significantly reduce tumor size and improve relevant clinical parameters. The procedure exhibited a favorable safety profile. Observed complications were mild and transient, and can be effectively managed through real-time technical adjustments. The use of image guidance, such as ultrasound and computed tomography, ensured precise planning, minimizing risks in critical locations, such as vascular structures in pheochromocytomas or proximity to the skull in nasal carcinomas. From a technical perspective, RFA's versatility across various tumor configurations and its adaptability to clinical settings are highlighted. The use of expandable electrodes, coupled with multiparametric monitoring, optimized ablative volumes while ensuring safety. Furthermore, the integration of RFA into multimodal protocols, including chemotherapy or assisted surgery, enhances its therapeutic potential. However, certain technical challenges were identified, such as the heat-sink effect in vascularized tumors and limitations in real-time thermal monitoring. These barriers underscore the need for technological advancements, such as adaptive control systems or hybrid imaging, to improve the procedure's efficacy and predictability. In conclusion, this research scientifically validates RFA as an effective, safe, and applicable tool in veterinary oncology. It proposes future research directions to optimize its implementation, including the development of advanced technologies, evaluation of new tumor indications, and its combination with emerging immunotherapies. RFA has the potential to become a therapeutic option with a significant impact on patient quality of life, particularly for those with contraindications for traditional surgical treatments.