Rare cancers and cancer of unknown primary: Here's what you should know!

An introduction to articles published within the issue is presented, including a study on the unmet supportive care needs of rare cancer patients, another on a multimodal interdisciplinary rehabilitation program (HAPPY) that was developed specifically for patients treated with non-myeloablative allogeneic haematopoietic stem cell transplantation (NMA-HSCT), and one on the experiences of hematological cancer patients and experts regarding return to work (RTW) and participation at work.