We report here the different roles undertaken by the members of 10 multidisciplinary cancer teams in conveying information to patients during their care. Team members completed an Informational Roles Questionnaire measuring an individual's perception of their major role and that of their colleagues in giving information to patients. They also completed two standard psychological health measures, the General Health Questionnaire and Maslach Burnout Inventory. The information giving roles of the surgeon, oncologist, radiologist and clinical nurse specialist were well recognised by their colleagues; however, other team members' roles were more ambiguous and less well understood. The clinical nurse specialist provided the broadest information coverage for patients. Few professional groups regularly informed patients about clinical trials and family history and the clinical nurse specialist was often the only person to deal with patients' sexual well being, consequently these areas are likely to receive poor coverage. Probable psychiatric morbidity (GHQ> or =4) in teams ranged from 5 to 27%. High levels of emotional exhaustion were particularly apparent in team leaders and nurses and feelings of low levels of personal accomplishment were prevalent in the histopathologists and radiologists. Putative benefits to patients and healthcare professionals from multidisciplinary team working may not be realised without investment in team training.