Abstract
A 65 year-old male myeloma case with peculiar immunoglobulin findings is reported.
Serum electrophoresis revealed two compoments or spikes of K type gamma G myeloma protein. Bence Jones proteins in the urine consisted of type K and type L. The myeloma cells aspirated from the bone marrow were composed of two cell types on light- and electronmicroscopic observation; the one had chromatin-rich nucleus with a prominent nucleolus and parallel endoplasmic reticula, the other had scattered chromatin in nucleus and distended endoplasmic reticula.
It might be conceivable that these two types of cells could be compatible with two types of Bence Jones proteins.
