Volume 186, Issue 5 pp. 706-716
Research Paper

Long term outcomes in monoclonal gammopathy of renal significance

Akhil Khera

Corresponding Author

Akhil Khera

Department of Haematology, Oxford University Hospitals NHS Foundation Trust, UK

Correspondence: Akhil Khera, Department of Haematology, Oxford Cancer and Haematology Centre, Churchill Hospital, Oxford University Hospitals NHS Foundation Trust, Old Road, Oxford OX3 7LE, UK.

E-mail: [email protected]

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Fotios Panitsas

Fotios Panitsas

Department of Hematology, Larissa University Hospital, Larissa, UK

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Faouzi Djebbari

Faouzi Djebbari

Department of Haematology, Oxford University Hospitals NHS Foundation Trust, UK

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Katja Kimberger

Katja Kimberger

Department of Nephrology, Royal Berkshire NHS Foundation Trust, Reading, UK

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Simon Stern

Simon Stern

Department of Haematology, Epsom and St Helier University Hospitals NHS Trust, Carshalton, UK

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John Quinn

John Quinn

Department of Haematology, Beaumont Hospital, Dublin, Ireland

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Neil Rabin

Neil Rabin

Department of Haematology, University College London Hospitals NHS Foundation Trust, London, UK

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Jaimal Kothari

Jaimal Kothari

Department of Haematology, Oxford University Hospitals NHS Foundation Trust, UK

NIHR BRC Blood Theme, Oxford, UK

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Bassam Alchi

Bassam Alchi

Department of Nephrology, Royal Berkshire NHS Foundation Trust, Reading, UK

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Richard Haynes

Richard Haynes

Oxford Kidney Unit, Oxford University Hospitals NHS Foundation Trust, UK

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Christopher Winearls

Christopher Winearls

Oxford Kidney Unit, Oxford University Hospitals NHS Foundation Trust, UK

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Ian Roberts

Ian Roberts

Department of Cellular Pathology, Oxford University Hospitals NHS Foundation Trust, Oxford, UK

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Karthik Ramasamy

Karthik Ramasamy

Department of Haematology, Oxford University Hospitals NHS Foundation Trust, UK

NIHR BRC Blood Theme, Oxford, UK

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First published: 29 May 2019
Citations: 19

[Correction added on 20 June 2019, after online publication: The author’s (Bassam Alchi) affiliation was previously incorrect and has been updated in this version]

Summary

Unlike AL amyloid and cast nephropathy, the long-term outcomes of monoclonal gammopathy of renal significance (MGRS) patients with other renal histopathologies remain unclear. It is uncertain if early intervention improves renal outcomes, because of a lack of evidence from prospective studies. In this retrospective study, we examined outcomes of 41 MGRS patients treated between 2004 and 2017 across five centres: four in the UK and one in the Republic of Ireland. The primary outcome measure was renal survival estimated by Kaplan–Meier product-limit method. Thirty-three patients (80·5%) were kappa light chain (LC) restricted. Twenty-seven patients (65·9%) presented with LC deposition disease on renal histology. At 24 months follow-up, estimated renal survival was 81·6% for the whole cohort. The estimated overall survival was 80·3% at 48 months. At 24 months, patients who had chronic kidney disease (CKD) stage 2–3b at diagnosis showed an estimated renal survival of 100% compared to 80·7% in those with CKD stage 4–5 at diagnosis (P = 0·04). Poorer outcomes in MGRS patients were historically attributed to delayed diagnosis due to small plasma cell clones, as well as the need for renal biopsy.

Conflicts of interests

The authors have no competing interests to declare.

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