Previous research on patients' and nurses' perceptions of nurse caring behaviours has documented significant differences in the ranking of important behaviours. However, these samples have included a variety of medical-surgical patients and nurses and different types of institutional settings, all of which may have affected the results. The present study sought to determine if patients and nurses from one subspecialty area and one institution would have more concordant perceptions of caring. Forty-four oncology patients and 49 oncology nurses completed the Respondents Perceptions of Caring Behaviour Scale (RPCBS). Results showed that overall mean patient rankings were highly correlated with mean nurse rankings (Spearman's correlations coefficient 0.94, P<0.0001). The Wilcoxon two-sample rank sum test was used to test the difference in rank of the 20 items between the patients and nurses. There was a significant difference in rank in only six of the 20 items. These data suggest that oncology patients and nurses have more concordant perceptions of caring than previously investigated groups. Implications for practice and further research are discussed.