Management of thyroid nodules incidentally discovered on MIBI scanning for primary hyperparathyroidism.
Tristan Greilsamer, Claire Blanchard, Niki Christou, Delphine Drui, Catherine Ansquer, Maelle Le Bras, Bertrand Cariou, Cécile Caillard, Emmanuelle Mourrain-Langlois, Anne Sophie Delemazure, Muriel Mathonnet, Françoise Kraeber-Bodéré, Eric Mirallié
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Tristan Greilsamer: Clinique de Chirurgie Digestive et Endocrinienne (CCDE), Institut des Maladies de l'Appareil Digestif (IMAD), Centre Hospitalier Universitaire (CHU) Nantes-Hôtel Dieu, Place Alexis Ricordeau, 44093, Nantes, France.
INTRODUCTION: Parathyroid sestamibi scan is routinely performed before parathyroid surgery. A large number of thyroid cancers take up 99mTc-sestamibi (MIBI). Since 2001, thyroid nodules discovered on sestamibi, nodules >2 cm, and/or with suspicious criteria were resected. The aim of this study was to evaluate the results of this policy. METHODS: All patients operated on for hyperparathyroidism, with a MIBI and cervical ultrasonography (US) with a thyroid resection for nodule, were retrospectively included. RESULTS: From 2001 to 2013, 685 patients were operated on for hyperparathyroidism. Some 137 (85 % females) had both preoperative MIBI and cervical US and a thyroid resection. The mean age was 63.2 ± 12.8 years. Sixty-three patients had a total thyroidectomy and 74 a lobectomy. Thirty-six patients had a thyroid cancer. The median size of cancers was 6.5 mm (0.3-22 mm), and 23 (16.7 %) patients had microcarcinoma. Among the 137 patients, 44 (32 %) had a MIBI+ nodule including 22 cancers. Sixty-one percent of malignant nodules were MIBI+ (22/36). The median size of MIBI+ cancers was 15 mm (9-22 mm) versus 2 mm (0.3-17 mm) for MIBI- cancers (p = 0.03). Twenty-two percent of benign nodules were MIBI+ (22/101). Finally, the sensitivity, specificity, positive predictive value, and negative predictive value of MIBI were 61, 78, 50, and 85 %, respectively. CONCLUSION: Thyroid nodules incidentally discovered on MIBI in hyperparathyroidism patients should be resected.
