Laboratory and clinical data on serologically confirmed VITT patients with discrepant results on VITT testing platforms
Sex . | Age (y) . | Platelet count (×109/L) . | D-dimer (fold-change) . | Thrombosis . | ELISA . | ELISA OD . | Flow cytometry . | SRA . | Multiplate . | Serologically confirmed VITT . | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Standard . | PF4 enhanced . | Standard . | PF4 enhanced . | |||||||||
Serologically confirmed VITT, standard flow cytometry negative/equivocal (n = 9) | ||||||||||||
M | 75 | 41 | 25 | Renal artery occlusion | Positive | 2.4 | Negative | Classical VITT | Positive | NT | Positive | Yes |
M | 79 | 249 | 7.2 | PE | Positive | 1.8 | Negative | Heparin-enhancing VITT | Positive | NT | Negative | Yes |
M | 76 | 53 | 40 | CVST, bilateral DVT | Negative | 0.11 | Negative | Negative | Positive | NT | Negative | Yes |
M | 73 | 124 | 14.5 | PE, DVT | Negative | 0.064 | Negative | Negative | Weak positive | Weak positive | NT | Yes |
F | 53 | 45 | 17 | Carotid artery, CVST, PE, LL arterial | Positive | 0.36 | Negative | Classical VITT | Positive | NT | Negative | Yes |
F | 35 | 153 | 5 | CVST | Positive | 1.34 | Equivocal | Equivocal | Weak positive | Equivocal | Inconclusive | Yes |
F | 54 | 108 | 5.8 | MCA stroke | Positive | 0.88 | Equivocal | Classical VITT | Negative | NT | Negative | Yes |
M | 63 | 110 | 26.6 | PE | Positive | 0.87 | Inconclusive | Classical VITT | Negative | Equivocal (negative) | NT | Yes |
M | 70 | 100 | 22 | DVT | Positive | 0.74 | Negative | Classical VITT | NT | Inconclusive | NT | Yes |
Serologically confirmed VITT, standard flow cytometry positive (n = 18) | ||||||||||||
M | 55 | 198 | NT | PE | Negative | 0.14 | Classical VITT | NT | Positive | NT | Positive | Yes |
M | 74 | 89 | 28.75 | PE, DVT | Negative | 0.16 | Classical VITT | Classical VITT | Positive | NT | Negative | Yes |
M | 78 | 16 | 44 | ICA | Negative | 0.15 | Classical VITT | NT | Positive | NT | NT | Yes |
M | 79 | 46 | 31 | Popliteal | Negative | 0.18 | Classical VITT | NT | Positive | NT | NT | Yes |
M | 49 | 125 | 16 | DVT | Positive | 0.6 | Classical VITT | NT | Negative | Positive | Positive | Yes |
M | 77 | 220 | 32.5 | PE, DVT | Weak positive | 0.38 | Classical VITT | NT | Negative | Negative | Positive | Yes |
M | 77 | 138 | 16 | MCA stroke | Positive | 0.215 | Classical VITT | NT | Negative | Negative | Negative | Yes |
F | 19 | 42 | 119.8 | PE | Positive | 2.56 | Classical VITT | NT | Negative | Negative | NT | Yes |
M | 53 | 38 | 40 | Portal vein thrombosis | Positive | 2.1 | Classical VITT | NT | Negative | Positive | NT | Yes |
F | 51 | 14 | 40 | CVST, bilateral ICA | Positive | 1.21 | Classical VITT | NT | Negative | Positive | NT | Yes |
F | 82 | 161 | 62 | Proximal DVT | Weak positive | 0.29 | Classical VITT | NT | Negative | Negative | Negative | Yes |
F | 40 | 25 | 40 | CVST, bilateral ICA, PE, portal vein thrombosis | Positive | 1.46 | Classical VITT | NT | Negative | Negative | Positive | Yes |
M | 69 | 86 | 120 | Splanchnic vein thrombosis | Positive | 1.73 | Classical VITT | NT | Negative | NT | NT | Yes |
F | 61 | 95 | 40 | Soleal vein thrombosis | Positive | 1.24 | Classical VITT | NT | Negative | Positive | Positive | Yes |
M | 54 | 128 | 15.2 | Proximal DVT | Negative | NA | Classical VITT | NT | Negative | Negative | Negative | Yes |
F | 74 | 62 | 19.8 | PE | Positive | 2.91 | Classical VITT | NT | Negative | Positive | Negative | Yes |
M | 71 | 77 | 14.8 | Bilateral PE | Positive | 2.39 | Classical VITT | NT | Negative | NT | NT | Yes |
F | 59 | 125 | 66 | PE | Negative | 0.07 | Classical VITT | NT | Negative | Positive | NT | Yes |
Sex . | Age (y) . | Platelet count (×109/L) . | D-dimer (fold-change) . | Thrombosis . | ELISA . | ELISA OD . | Flow cytometry . | SRA . | Multiplate . | Serologically confirmed VITT . | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Standard . | PF4 enhanced . | Standard . | PF4 enhanced . | |||||||||
Serologically confirmed VITT, standard flow cytometry negative/equivocal (n = 9) | ||||||||||||
M | 75 | 41 | 25 | Renal artery occlusion | Positive | 2.4 | Negative | Classical VITT | Positive | NT | Positive | Yes |
M | 79 | 249 | 7.2 | PE | Positive | 1.8 | Negative | Heparin-enhancing VITT | Positive | NT | Negative | Yes |
M | 76 | 53 | 40 | CVST, bilateral DVT | Negative | 0.11 | Negative | Negative | Positive | NT | Negative | Yes |
M | 73 | 124 | 14.5 | PE, DVT | Negative | 0.064 | Negative | Negative | Weak positive | Weak positive | NT | Yes |
F | 53 | 45 | 17 | Carotid artery, CVST, PE, LL arterial | Positive | 0.36 | Negative | Classical VITT | Positive | NT | Negative | Yes |
F | 35 | 153 | 5 | CVST | Positive | 1.34 | Equivocal | Equivocal | Weak positive | Equivocal | Inconclusive | Yes |
F | 54 | 108 | 5.8 | MCA stroke | Positive | 0.88 | Equivocal | Classical VITT | Negative | NT | Negative | Yes |
M | 63 | 110 | 26.6 | PE | Positive | 0.87 | Inconclusive | Classical VITT | Negative | Equivocal (negative) | NT | Yes |
M | 70 | 100 | 22 | DVT | Positive | 0.74 | Negative | Classical VITT | NT | Inconclusive | NT | Yes |
Serologically confirmed VITT, standard flow cytometry positive (n = 18) | ||||||||||||
M | 55 | 198 | NT | PE | Negative | 0.14 | Classical VITT | NT | Positive | NT | Positive | Yes |
M | 74 | 89 | 28.75 | PE, DVT | Negative | 0.16 | Classical VITT | Classical VITT | Positive | NT | Negative | Yes |
M | 78 | 16 | 44 | ICA | Negative | 0.15 | Classical VITT | NT | Positive | NT | NT | Yes |
M | 79 | 46 | 31 | Popliteal | Negative | 0.18 | Classical VITT | NT | Positive | NT | NT | Yes |
M | 49 | 125 | 16 | DVT | Positive | 0.6 | Classical VITT | NT | Negative | Positive | Positive | Yes |
M | 77 | 220 | 32.5 | PE, DVT | Weak positive | 0.38 | Classical VITT | NT | Negative | Negative | Positive | Yes |
M | 77 | 138 | 16 | MCA stroke | Positive | 0.215 | Classical VITT | NT | Negative | Negative | Negative | Yes |
F | 19 | 42 | 119.8 | PE | Positive | 2.56 | Classical VITT | NT | Negative | Negative | NT | Yes |
M | 53 | 38 | 40 | Portal vein thrombosis | Positive | 2.1 | Classical VITT | NT | Negative | Positive | NT | Yes |
F | 51 | 14 | 40 | CVST, bilateral ICA | Positive | 1.21 | Classical VITT | NT | Negative | Positive | NT | Yes |
F | 82 | 161 | 62 | Proximal DVT | Weak positive | 0.29 | Classical VITT | NT | Negative | Negative | Negative | Yes |
F | 40 | 25 | 40 | CVST, bilateral ICA, PE, portal vein thrombosis | Positive | 1.46 | Classical VITT | NT | Negative | Negative | Positive | Yes |
M | 69 | 86 | 120 | Splanchnic vein thrombosis | Positive | 1.73 | Classical VITT | NT | Negative | NT | NT | Yes |
F | 61 | 95 | 40 | Soleal vein thrombosis | Positive | 1.24 | Classical VITT | NT | Negative | Positive | Positive | Yes |
M | 54 | 128 | 15.2 | Proximal DVT | Negative | NA | Classical VITT | NT | Negative | Negative | Negative | Yes |
F | 74 | 62 | 19.8 | PE | Positive | 2.91 | Classical VITT | NT | Negative | Positive | Negative | Yes |
M | 71 | 77 | 14.8 | Bilateral PE | Positive | 2.39 | Classical VITT | NT | Negative | NT | NT | Yes |
F | 59 | 125 | 66 | PE | Negative | 0.07 | Classical VITT | NT | Negative | Positive | NT | Yes |
CVST, cerebral venous sinus thrombosis; DVT, deep vein thrombosis; F, female; ICA, internal carotid artery; LL, lower limb; M, male; MCA, middle cerebral artery; NA, not available; NT, not tested; OD, optical density; PE, pulmonary embolism.