Intraoperative Determination of PTH Concentrations in Fine Needle Tissue Aspirates to Identify Parathyroid Tissue During Parathyroidectomy
- János HorányiAffiliated with1st Department of Surgery, Semmelweis University Email author
- , László DuffekAffiliated withDepartment of Radiology and Oncotherapy, Semmelweis University
- , Rezső SzlávikAffiliated with1st Department of Surgery, Semmelweis University
- , István TakácsAffiliated with1st Department of Medicine, Semmelweis University
- , Miklós TóthAffiliated with2nd Department of Medicine, Semmelweis University
- , László RomicsJr.Affiliated withVictoria Infirmary Glasgow
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Exact tissue identification during parathyroidectomy is essential to successfully cure hyperparathyroidism. PTH level determination from tissue aspirates has been advocated as a “biochemical frozen section” for parathyroid tissue identification. We investigated the sensitivity and specificity of this method in a large cohort of consecutive patients who underwent parathyroidectomy in a tertiary referral center.
PTH levels of 359 tissue aspirates were measured intraoperatively in 223 consecutive patients from March 2006 to December 2008. Suspected parathyroid and control tissues were aspirated with a standardized technique immediately after their excision. Samples were processed for quick-PTH assay with peripheral blood samples before and after excision. PTH levels from tissue aspirates were correlated with pathological diagnosis. The Mann–Whitney test was used to determine statistical significance (P < 0.05).
A total of 255 parathyroid (196 adenoma, 30 hyperplasia, 4 carcinoma, 25 normal parathyroid) and 104 nonparathyroid tissue (88 thyroid, 16 lymph node, thymus, or fat) aspirates were compared. A highly significant difference was found between PTH levels of parathyroid (8,120 ± 2,711 pg/ml; interquartile range (IQR): 4,949–9,075) and nonparathyroid (0.8 ± 9.29 pg/ml; IQR: 0.4–1.4) tissue aspirates (P < 0.005). This test is 100% sensitive and 100% specific to identify parathyroid tissue for values >84 pg/ml. Furthermore, PTH levels of pathological parathyroid aspirates (8,169 ± 2,597; IQR: 5,634–9,109) were higher than that of normal parathyroid aspirates (4,130 ± 2,952; IQR: 2,569–8,284; P = 0.0011).
PTH level determination from tissue aspirates is a highly reliable, quick, and simple method to differentiate parathyroid and nonparathyroid tissues during parathyroidectomy. This method can obviate frozen sections in patients undergoing surgery for hyperparathyroidism.
- Intraoperative Determination of PTH Concentrations in Fine Needle Tissue Aspirates to Identify Parathyroid Tissue During Parathyroidectomy
World Journal of Surgery
Volume 34, Issue 3 , pp 538-543
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- 1. 1st Department of Surgery, Semmelweis University, Üllői út 78, 1082, Budapest, Hungary
- 2. Department of Radiology and Oncotherapy, Semmelweis University, Üllői út 78/A, 1082, Budapest, Hungary
- 3. 1st Department of Medicine, Semmelweis University, Korányi Sándor u. 2/A, 1083, Budapest, Hungary
- 4. 2nd Department of Medicine, Semmelweis University, Szentkirályi u. 46, 1088, Budapest, Hungary
- 5. Victoria Infirmary Glasgow, Langside Road, G42 9TY, Glasgow, UK