Light chain multiple myeloma: a lesson to learn

This case report is to emphasise the importance of investigating urine as well as the serum for monoclonal band if multiple myeloma [MM] is suspected. On many occasions a specimen of serum is sent alone without the urine specimen to exclude myelomatosis. It is important to note that in light chain myeloma, which contributes to about 20% of myelomatosis, the diagnosis could be easily missed or unnecessarily delayed if only serum is investigated as it happened with the present case