Table 3.

Results in 5 patients in whom serum immunofixation failed to identify the amyloidogenic κ light chain.

IDSexSerum HR-IFEUrine HR-IFESerum IFEUrine IFEκ FLC, mg/Lλ FLC, mg/LFLC κ/λ ratioIEH typingCreatinine, μmol/L1Organs involvedCardiac stage2
8FNot detectedFree κNot detectedFree κ329.021.215.52 (κ)κ94Heart, liverII
18MNot detectedFree κNot detectedFree κ378.056.36.71 (κ)κ347Kidney, heart, liverII
22MNot detectedFree κNot detectedFree κ505.013.836.59 (κ)κ138HeartIII
74FNot detectedFree κNot detectedNot detected395.027.814.21 (κ)κ322Kidney, heartII
108FNot detectedFree κNot detectedFree κ158.053.12.98 (κ)κ394Kidney, heartII