4.4 Article

The Normohormonal Primary Hyperparathyroidism; a surgical dilemma pre and intra-operatively

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AMERICAN JOURNAL OF SURGERY
卷 223, 期 3, 页码 589-591

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EXCERPTA MEDICA INC-ELSEVIER SCIENCE INC
DOI: 10.1016/j.amjsurg.2022.01.002

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Hyperparathyroidism; Normohormonal primary hyperparathyroidism; Intra-operative PTH; Parathyroidectomy

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Normohormonal Primary Hyperparathyroidism (NPHPT) is rare and often diagnosed in later stages. More than 50% of cases require exploration of all four glands. A drop in intra-operative PTH below 30 pg/ml can be considered indicative of successful surgery.
Introduction: Normohormonal Primary Hyperparathyroidism (NPHPT), poses a dilemma for surgeons; first in deciding when to operate where the PTH is normal and second at what level should the drop in intra-operative PTH (ioPTH) be considered a successful operation. Materials & methods: A retrospective evaluation of all parathyroidectomies performed by a single surgeon from 2009 to 2019 was conducted. Results: In 33 of 349 (9%) parathyroidectomies the indication was NPHPT. Negative pre-operative nuclear localization was found in 17(52%) patients. Intra-operative findings were: 27(82%) single-adenoma, 3(9%) double-adenomas and 3(9%) hyperplasia. In patients with single-adenomas the ioPTH dropped from 57 +/- 8 to 23 +/- 10 pg./ml. The average size of the adenomas was 403 +/- 360 mg. Conclusion: NPHPT is uncommon where the disease is diagnosed in its early stages. Over 50% has negative pre-operative nuclear localization test requiring 4-gland surgical exploration. The intra-operative drop in PTH below 30 pg./ml can be utilized as an indicator of a successful operation.

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