The authors' aim was to identify the determinants of intrusive recollections related to receiving a cancer diagnosis in women after cancer treatment. A consecutive series of breast cancer patients at 3-15 months after surgery, consisting of subjects with (N=63) and without (N=92) intrusive recollections was examined. Logistic regression analysis revealed that neuroticism, precancer intrusive recollections, and the number of cancer patients in relatives by marriage were final significant determinants, and receiving radiotherapy was an associated factor. These results suggest that biopsychosocial factors contribute to intrusive recollections and have clinical implications for the use of these characteristics in screening and early intervention.