Calcitonin-negative 'MTC-like' thyroid paraganglioma revealing an SDHD-related hereditary paraganglioma syndrome: functional confirmation of a non-canonical splice-site variant.
INTRODUCTION Primary thyroid paraganglioma (TPGL) is a rare mimic of medullary thyroid carcinoma (MTC). We report an SDHD-related TPGL caused by a non-canonical splice-region variant. CASE PRESENTATION A 36-year-old woman underwent thyroidectomy for a 20 mm EU-TIRADS 4 Bethesda III thyroid nodule with normal serum ca...