Case Reports in Endocrinology / 2021 / Article / Tab 1

Case Report

Factitiously Elevated Total Triiodothyronine in a Euthyroid Patient with Multiple Myeloma

Table 1

Summary of laboratory results.

TFTsRoche Cobas kit, 08/28/19Siemens Atellica kit, 10/25/20Siemens Atellica kit, 10/26/20Roche Cobas kit 11/17/20

TSH0.750 (0.27–4.2 uIU/mL)6.27 (0.55–4.78 uIU/mL)4.84 (0.55–4.78 uIU/mL)1.82 (0.27–4.2 IU/mL)
FT41.22 (0.89–1.76 ng/dL)1.28 (0.89–1.76 ng/dL)
TT47.6 (4.5–12.0 μg/dL)4.5 (3.2–12.6 μg/dL)4.7 (3.2–12.6 μg/dL)
TT382 (80–200 ng/dL)>600 (60–181 ng/dL)>600 (60–181 ng/dL)47.4 (80–200 ng/dL)
HAMA<56 (<74 ng/mL)
TPO ab<1 (<9 IU/mL)
TG ab<1 (<1 IU/mL)
TSI<89 (<140%)
T3 antibodyNegative (Quest/Nichols proprietary test)
Free T31.7 (2.3–4.2 pg/mL) (Siemens Advia kit)
Reverse T321 (8–25 ng/dL) (Thermo Aria kit)

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