Malignant tumors often form metastases that spread to other parts of the body via the lymphatic system. High surgical skills are required to identify the precise location of the affected lymph nodes, enabling them to be completely removed. Fraunhofer researchers have developed a navigation aid that simplifies such interventions. 3-D-ARILE is an augmented reality (AR) system that superimposes a virtual image of the exact position of the lymph nodes using data glasses. The new system will be presented to the public at the Medica trade fair, from November 13 to 16.