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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10334351PMC
http://dx.doi.org/10.1016/j.ekir.2023.04.002DOI Listing

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Bone scintigraphy is recognized as a noninvasive alternative to endomyocardial biopsy for the diagnostic of wild-type (wATTR) and hereditary ATTR amyloidosis (hATTR). Light chain amyloidosis (AL), Randall-type monoclonal immunoglobulin deposition disease , sarcoidosis, hemochromatosis, Fabry disease, and mucopolysaccharidoses are differential diagnosis of ATTR amyloidosis. Bone scintigraphy allows visualization of extracardiac involvements of AL amyloidosis: pleural, retroperitoneal, liver, spleen, and soft tissue.

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Glomerulonephritis with non-Randall-type, non-cryoglobulinaemic monoclonal immunoglobulin G deposits (PGNMID and ITG).

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Department of Nephrology, Dialysis and Transplantation, University Hospital, and MP3CV Research Laboratory, Jules Verne Picardie University, Amiens, France.

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  • - Glomerulonephritis (GN) with non-Randall-type, non-cryoglobulinaemic IgG deposits includes rare forms like PGNMID and immunotactoid GN; differentiation requires electron microscopy (EM).
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Randall-type monoclonal immunoglobulin deposition disease (MIDD) is a rare disease that belongs to the spectrum of monoclonal gammopathy of renal significance (MGRS). Renal involvement is prominent in MIDD, but extra-renal manifestations can be present and may affect global prognosis. Recent data highlighted the central role of molecular characteristics of nephrotoxic monoclonal immunoglobulins in the pathophysiology of MIDD, and the importance of serum free light chain monitoring in the diagnosis and follow-up disease.

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