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  • Title: Operative failure in the era of focused parathyroidectomy: a contemporary series of 845 patients.
    Author: Lew JI, Rivera M, Irvin GL, Solorzano CC.
    Journal: Arch Surg; 2010 Jul; 145(7):628-33. PubMed ID: 20644124.
    Abstract:
    HYPOTHESIS: Focused parathyroidectomy guided by intraoperative parathyroid hormone monitoring (IPM) may lead to higher failure rates because of missed multiglandular disease. DESIGN: Retrospective review of prospectively collected data. SETTING: Tertiary referral center. PATIENTS: From September 8, 1993, through January 30, 2009, a total of 845 consecutive patients with sporadic primary hyperparathyroidism underwent focused parathyroidectomy guided by IPM at a single institution. MAIN OUTCOME MEASURES: Parathyroid hormone dynamics and perioperative data were analyzed for factors affecting outcome. Operative failure was defined as hypercalcemia with elevated parathyroid hormone levels within 6 months after parathyroidectomy. Detailed intraoperative data from the failed operations were also reviewed. RESULTS: Of 723 patients followed up for at least 6 months, 702 (97.1%) had successful parathyroidectomy, and 21 (2.9%) had failed parathyroidectomy. The major cause of operative failure was the surgeon's inability to find the abnormal parathyroid gland (16 of 21 patients [76.2%]). In the remaining patients, IPM results were false-positive in 5 of 21 patients (23.8%) or 0.7% overall. Among the cohort, IPM correctly identified missed multiglandular disease in 33 of 38 patients (86.8%). Patients having operative failure were more likely to have a history of thyroidectomy or parathyroidectomy and were less likely to have correct findings on technetium Tc 99m sestamibi or ultrasonographic localizing studies compared with patients having operative success. CONCLUSION: Inability of the surgeon to find the abnormal parathyroid gland-not missed multiglandular disease-is the main cause of operative failure in focused parathyroidectomy guided by IPM.
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