1Department of Ultrasonography, the Affiliated Jiangyin Hospital of Southeast University Medical College, Jiangyin 214400, China; 2Department of Radiology, the Affiliated Jiangyin Hospital of Southeast University Medical College, Jiangyin 214400, China; 3Department of Breast and Thyroid Surgery, the Affiliated Jiangyin Hospital of Southeast University Medical College, Jiangyin 214400, China; 4Department of Pathology, the Affiliated Jiangyin Hospital of Southeast University Medical College, Jiangyin 214400, China
Abstract:Objective To assess the clinical value of 99Tcm-methoxyisobutvlisonitrile(MIBI) SPECT/CT and ultrasonography in preoperatively precise localization of parathyroid glands in patient with renal secondary hyperparathyroidism (SHPT).Methods Clinical data of 28 consecutive SHPT patients who underwent total parathyroidectomy with autotransplantation in the Department of Breast and Thyroid Surgery, Affiliated Jiangyin Hospital of Southeast University Medical College between January 2014 and December 2017 were retrospectively analyzed, including 16 males and 12 females with the age of 13-72 (44.54±14.07) years old. The location, number and size of parathyroid glands during operation were counted, and divided into ≥1 cm and <1 cm two groups according to longitudinal diameter, the accuracy localization of 99Tcm-MIBI SPECT/CT and ultrasonography parathyroid gland in two groups was compared.Results In 28 patients, 109 parathyroid glands were found in surgical exploration, including 97 parathyroid glands behind thyroid gland, 3 parathyroid glands in carotid sheath, 2 parathyroid glands in tracheoesophageal groove, 2 parathyroid glands in mediastinum, 2 parathyroid glands in clavicular plane, 2 parathyroid glands intrathyroid and 1 parathyroid gland intrathymus. The longitudinal diameter of 109 parathyroid glands ranged from 0.7 cm to 3.8 cm, 57 parathyroid glands were over 1 cm and 52 parathyroid glands were less than 1 cm. The total detection rate of 99Tcm-MIBI SPECT/CT and the detection rate of parathyroid gland with maximum diameter <1 cm were 84.4%(92/109)and 78.8%(41/52), respectively, which were higher than 69.7%(76/109)and 55.8%(29/52)of ultrasonography, with statistically significant differences (χ2=8.533, 6.722, all P values<0.01). There was no significant difference in the detection rate of parathyroid gland with maximum diameter <1 cm between 99Tcm-MIBI SPECT/CT and ultrasonography(P>0.05). The 4 cases of concomitant thyroid microcarcinoma, 3 cases were detected by ultrasonography alone.Conclusions99Tcm-MIBI SPECT/CT has higher detection rate of parathyroid glands than ultrasonography, especially in small one; however, ultrasonography has more advantages for renal SHPT patients concomitant with thyroid microcarcinoma. It is suggested that combined 99Tcm-MIBI SPECT/CT with ultrasonography could do well in preoperative localization of parathyroid glands in patient with renal SHPT.
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