In multiple myeloma, abnormal plasma cells build up inside bone marrow -- the spongy tissue inside large bones where blood cells are produced. Over time, myeloma cells cause damage to bones, kidneys, ...

Bone marrow aspiration is generally a safe procedure ... proximal humerus (greater tubercle), trochanteric fossa of the proximal femur, sternum or rib. The most common sites are the iliac crest ...