Erosive spondyloarthropathy (ESA) is common in long-term hemodialysed patients. However, it has been little recognized in peritoneal dialysis (PD) patients. In a retrospective study, we found severe ESA in 7 of the 87 (8%) patients undergoing PD in our center. Characteristics of our population were advanced age and short duration of dialysis (27±20 months). ESA patients were older than non ESA (74±4 vs 68±11 yrs,p<0.01). Secondary hyperparathyroidism and dialysis amyloid arthropathy were also possible pathogenic factors. Patients were followed for 4 years or until death and remained stable in most ESA cases. We conclude that ESA is age-related, is as frequent in PD as in HD populations and is not related to one single underlying mechanism.