Records of eight elderly patients identified as BPD by a geriatric team were analyzed for compliance with DIB-R and DSM-III-R criteria. A nonborderline control group was randomly selected and matched for age, gender and residence. Clinicians experienced in geriatric mental health performed retrospective chart reviews and found that not one clinically diagnosed BPD patient was identified by either instrument. Although there appear to be a number of constant features of BPD throughout life, this study delineated two major areas of change in BPD in late life.