Systemic Light Chain Amyloidosis (Congo Red Inconclusive) with Underlyng Clonal Expansion Not Meeting the Criteria of Light Chain Monoclonal Gammopathy of Renal Significance or Light Chain Myeloma: A Case Report

  • Farsana Mustafa Post-Graduate Student, Department of Medicine, Lady Hardinge Medical College, New Delhi, India.
  • Sanjay Kumar Associate Professor, Department of Medicine, Lady Hardinge Medical College, New Delhi, India. https://orcid.org/0000-0001-5688-4376
  • Vijay Kumar Professor, Department of Pathology, Atal Bihari Vajpayee Institute of Medical Sciences, New Delhi, India.
Keywords: Amyloidosis, Congo Red Negative, MGRS, Light Chain Myeloma

Abstract

Fifty-eight-year-old male admitted for evaluation of nephrotic syndrome and chronic diarrhoea was detected to have Immunoglobulin light chain amyloidosis (AL Amyloidosis) which was congo red inconclusive from renal biopsy. Bone marrow biopsy showed monoclonal plasma cells of 40% and light chain assay showed predominance of immunoglobulin lambda light chain. The diagnosis was neither fitting into the current diagnostic criteria for light chain Monoclonal Gammopathy of Renal Significance (MGRS) nor light chain myeloma. Literature is scarce regarding patients with AL amyloidosis having underlying clonal expansion not meeting the criteria of light chain myeloma or light chain MGRS.

How to cite this article:
Mustafa F, Kumar S, Kumar V. Systemic Light Chain Amyloidosis (Congo Red Inconclusive) with Underlyng Clonal Expansion Not Meeting the Criteria of Light Chain Monoclonal Gammopathy of Renal Significance or Light Chain Myeloma: A Case Report. J Adv Res Med 2020; 7(4): 15-19.

DOI: https://doi.org/10.24321/2349.7181.202019

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Published
2021-06-14