The best cancer thesis of the year 2023 is Communication about serious illness as a relational process by Mattias Tranberg with the following motivation: "The work by Mattias Tranberg provides novel knowledge to improve clinical cancer care from a holistic viewpoint with focus on the relationship between health care staff and seriously ill patients". The price sum for this year's thesis is SEK 80,000 from the Maja and Hjalmar Leanders foundation manged by Skandinaviska Enskilda banken (SEB) and is intended to be used in research.