Table 2.

Clinical and Biochemical Features of Reported FNAB-Induced PHPT Remission

Authors	Age/sex	Measurements of parathyroid lesion at diagnosis	Measurements of parathyroid lesion at the end of follow-up	Calcium/albumin/PTH before FNAB	PTH washout levels	First measured calcium/PTH after FNAB	Calcium/albumin/PTH at the end of follow-up	Reoccurrence	Length of follow-up (mo)	Symptoms after FNAB
Ing and Pelliteri5	74/M	24 × 23 × 26 mm apparently intrathyroidal complex nodule	8 × 9 mm	16.2/NA/341	1800	7.9/NA (2 wk after FNAB)	9.8/NA/83	Yes	16	No
Maxwell et al6	63/F	39 mm intrathyroidal nodule	Surgery	12.4/NA/247	…	10.4/22 (4 d after FNAB)	9.2/NA/71	Yes	1	Neck pain, dysphagia, and voice modification
Kara et al7	67/F	5 × 16 × 29 mm hypoechoic extrathyroidal fusiform nodule	Disappeared	11.1a/NA/249	808	9.3/90 (3 mo after FNAB)	9.1∗/NA/53	No	105	Asymptomatic neck swelling
Present case	40/F	24 × 21 × 17 mm apparently intrathyroidal complex nodule	9 × 10 × 13 mm	14.2/3.9/380	181	8.1/NA (6 d after FNAB)	9.4/4.1/30	No	12	No

Abbreviations: F = female; FNAB = fine-needle aspiration biopsy; M = male; NA = not available; PHPT = primary hyperparathyroidism; PTH = parathyroid hormone.

Calcium presented as mg/dL, albumin as g/dL, and PTH as pg/mL.

PTH assays: second-generation for ⁶ and ⁷, third-generation for ⁵ and the present case.

Reference range for PTH: 6-40 pg/mL,⁵ 10-65 pg/mL,⁶ and 15-88 pg/mL.⁷

Reference range for serum calcium: 8.3-10.5 mg/dL,⁵ 8.4-10.2 mg/dL,⁶ and 8.5-10.6 mg/dL.⁷

^aCorrected calcium using the following formula: corrected calcium (mg/dL) = total serum calcium (mg/dL) + 0.8 × (4 − serum albumin [g/dL]).