A False Positive Serology Test of SARS‑CoV‑2 in a Patient with Waldenström's Macroglobulinemia: A Case Report

Overview

Journal Exp Ther Med

Specialty Pathology

Date 2023 Apr 24

PMID 37090080

Authors

Ni-Na Lu

Ling-Zhi Liang

Xiao-Yuan Yan

Bi-Ying Song

Ya-Qiong Zhang

Hai-Rong Shu

Ling-Long Xu

Affiliations

Soon will be listed here.

Abstract

The serology test of SARS-CoV-2 is one of the critical assays to make a diagnosis of SARS-CoV-2 infection. The gold immunochromatography assay (GICA) is a common measure to test SARS-CoV-2 specific IgG and IgM. The sensitivity and specificity of the assay are ~>80%. It has been reported that the result of GICA could be compromised in various situations, such as auto-immune diseases, Kawasaki disease, pregnancy or other conditions. However, following the European Hematology Association's consensus statement on the management of Waldenström's Macroglobulinemia (WM) patients, serological tests for SARS-CoV-2 specific IgM should not be affected by the total IgM or paraprotein levels. The present study reports a patient with duplicate positive serology tests of SARS-CoV-2 which is hypothesized to be due to monoclonal IgM caused by WM.

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