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Onkologie 8. Oktober 2015

Prognostic factors and their correlation with staging in patients with multiple myeloma: a single centre study in North India

Background: Multiple myeloma is a neoplastic disorder characterised by proliferation of a single clone of plasma cells leading to varied clinical presentations. Various clinical and laboratory parameters have been established as prognostic factors but their correlation with staging systems has been sparingly studied in Indian population.

Methods: A retrospective study was done over a period of 30 months at a tertiary care centre including 33 patients of multiple myeloma. Physical examination, radiological investigations and routine laboratory investigations including bone marrow exaacmination, serum protein electrophoresis and serum β2-microglobulin levels were recorded. Patients were staged according to the Durie–Salmon staging system (DSS) and the international staging system (ISS) and correlation between prognostic markers and clinical stage was studied.

Results: A total of 33 patients were included in the study, all of them had M-band in the gamma region on serum protein electrophoresis. Approximately, 51.5 % patients presented with renal failure and its presence correlated positively with the stage of disease (0.643, p < 0.001). Plasmacytosis showed a positive correlation with the stage of disease (0.351, p < 0.045). A significant positive correlation was also found between the DSS and ISS (0.575, p < 0.001). Haemoglobin, serum β2-microglobulin levels, advanced age, estimated sedimentation rate (ESR), serum creatinine and uraemia were other factors that significantly correlated with the clinical stage in our population.

Conclusion: Both ISS and DSS correlate well as staging systems for multiple myeloma in the Indian population. Routine investigations like haemoglobin, ESR, renal function tests and plasma cell percentage can be used for prognostication at initial presentation. Prognostic markers like serum β2-microglobulin and renal failure are strongly associated with more advanced stages of multiple myeloma.

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