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10 AbstRACt Introduction: When clinical treatment of secondary hyperparathyroidism fails, parathyroidectomy is mandatory. Total parathyroidectomy and immediate parathyroid autotransplantation in the forearm is the standard treatment at the DCCP HCFMUSP. In these cases, if hyperparathyroidism reccurs, it may be caused by hyperplastic graft tissue and, sometimes, reintervention is needed to resect hyperplasic implants. objective: The present study seeks to evaluate patients submitted to this treatment and try to clarify clinical factors that could predict hyperparathyroidism recurrence due to graft hyperplasia. method: We could retrospectively analyse data from 57 patients, and identify nine recurrences of hyperparathyroidism caused by graft hyperplasia, submitted to 14 implant resections. We choose a control group: autotransplantation without recurrence for at least two years (matched by age and sex). Results: We analyzed pre-operative clinical and laboratorial data, parathyroid weight and histological patterns. There were statistically significant differences among preoperative serum PTH (p=0,0091), parathyroid gland size resected during first surgery (p=0,0052) and nodular pattern at parathyroid chosen for transplantation (p=0,0152) and recurrence caused by graft tissue. In all patients, but one, the disease is controlled. All statistically significant identified risk factors were pre or perioperative and may help intra operative decisions. Conclusion: Based on this study, we suggest that the amount of graft tissue may be influenced by pre-op PTH levels, size of glands and presence of nodular hyperplasia. A large and/or nodular glands should be avoided for implants.

Hiperparatireoidismo secundário: fatores prognósticos de recidiva atribuída ao implante após paratireoidectomia total e auto-implante"