PMC6416964_01
Consistent access point for sampling internal jugular vein (orange arrow) for intra-operative parathyroid hormone level, distal to middle thyroid vein.
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STAT, Roche 2016). Samples were taken from the same junctional location bilaterally (Fig. 1), and pre-gland excision I-OPTH was higher on the left side (104.3 pmol/L left vs. 43.4 pmol/L right).
A) 100x Haematoxylin and Eosin Stain with parathyroid tissue (marked with arrow) and normal thyroid follicles, representing an intra-thyroidal, enlarged parathyroid adenoma; B) 100x PTH immunohistochemical stain of same area, with parathyroid tissue staining brown.
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Histopathology subsequently identified an intra-thyroidal parathyroid adenoma in normal thyroid tissue (Fig. 2).