Case Report

AL-Amyloidosis Presenting with Negative Congo Red Staining in the Setting of High Clinical Suspicion: A Case Report

Table 1

Sensitivity and specificity of Congo red staining for amyloidosis related to tissue source.

Sensitivity (%)Specificity (%)Reference

Bone marrow63[2]
Kidney, liver, cardiac87–98[2]
Fat-pad needle biopsy58100Guy and Jones cited in [4]
5575Ansari-lari and Ali cited in [4]
80100Hazenberg et al. cited in [4]
7893Dhingra et al. cited in [4]
>90 increased exam[2]
19 (22 gauge)[5]
Computer assisted75 100[4]
Fat-pad biopsy7390[6]