What is the definition or description of: kahler disease?

Multiple Myeloma: I had not heard of "kahler's disease" until seeing multiple questions on healthtap. It is multiple myeloma (mm). "multiple" is from the often seen "multiple" bone lesions (especially in advanced disease). Mm is a cancer of plasma cells [highly specialized b white blood cells (lymphocytes)] that produce antibodies. Sx are crab: hypercalcemia, renal insufficency, anemia, bone disease; & infection.