not-yet-known not-yet-known not-yet-known unknown CONCLUSION AND RESULTS The patient evolved with adequate treatment tolerance, with the EC disappearing in the third month of treatment (figure 1), despite the fact that hyperphosphemia was still not fully controlled (table 1). Nine months of treatment with STS were completed, after which she was transferred to a dialysis centre near to her home, and the dialysis time was adjusted to 4 hours, maintaining better control of calcium and phosphorus (table 1). Subsequently, the patient was under a close follow-up in our CKD-MBD outpatient clinic, remaining free of new lesions one year after STS was suspended, reaching adequate management of calcium and phosphorus even though PTH was above the standard goal, requiring management with calcimimetics. Her latest laboratory parameters are shown in table 1.