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Five-Year Follow-up Study of Monoclonal Gammopathy of Undetermined Significance in a Korean Elderly Urban Cohort
Year of publication 2015
Title of paper Five-Year Follow-up Study of Monoclonal Gammopathy of Undetermined Significance in a Korean Elderly Urban Cohort
Author Yun-Gyoo Lee, Soo-Mee Bang, Jeong-Ok Lee, Jin Won Kim, Keun-Wook Lee, Jee Hyun Kim, Jung Han Song, Tae-Hee Kim, Ki Woong Kim, and Jong-Seok Lee
Publication in journal Cancer Research and Treatment
Status of publication accepted
Vol 47(2)
Link https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4398103/ 251회 연결

Purpose

We previously reported the prevalence of monoclonal gammopathy of undetermined significance (MGUS) to be 3.3% among an elderly Korean urban cohort recruited during 2005-2006. Here, we report a 5-year follow-up study of the previously identified MGUS cohort.

Materials and Methods

The 680 participants from the initial cohort were followed-up for a median of 5 years. Sera were collected between 2010 and 2011. Two-step screening was performed with standard serum electrophoresis followed by immunofixation and determination of the serum concentration of monoclonal-protein (M-protein).

Results

Of the 680 participants (21 with MGUS), 348 (51%) agreed to participate in the follow-up study and 10 were found to have MGUS. Among the 21 MGUS patients initially identified, nine were followed-up, six had persistent M-protein, and one patient had progressed to multiple myeloma (progression rate, 1.0%/yr). The M-protein disappeared in the remaining two individuals. Among the 339 participants without MGUS who were followed-up, four developed an M-protein. There was no significant difference in survival with respect to the presence of MGUS (p=0.66).

Conclusion

The 5-year follow-up data show that the natural clinical course of MGUS in Korea is similar to that in Western countries. MGUS was not associated with an increased risk of death over the 5-year study period.