Myeloma Flashcards
What is myeloma?
• Myeloma is a type of cancer affecting the plasma cells in the bone marrow.
What does cancer of the plasma cells lead to production of?
specific paraprotein (or M protein), which is an abnormal antibody or part of an antibody.
What is multiple myeloma?
• Multiple myeloma is where the myeloma affects multiple bone marrow areas in the body.
What is monoclonal gammopathy of undetermined significance?
• Monoclonal gammopathy of undetermined significance (MGUS) involves the production of a specific paraprotein without other features of myeloma or cancer.
What is smouldering myeloma?
• Smouldering myeloma involves abnormal plasma cells and paraproteins but no organ damage or symptoms.
What proteins are found in urine in myeloma?
Bence Jones priteins
What are the 4 key features of myeloma?
Crab
C – Calcium (elevated) R – Renal failure A – Anaemia B – Bone lesions and bone pain
What is the most common complication of myeloma?
Anaemia
What type of anaemia is seen in myeloma?
Normocytic and normoblastic
What does myeloma bone disease result from?
increased osteoclast activity and suppressed osteoblast activity.
What are the most common sites of myeloma bone disease? (4)
○ The skull
○ Spine
○ Long bones
○ Ribs.
What do the bones look like in myeloma bone disease?
• The abnormal bone metabolism is patchy, meaning that the bone becomes very thin in some areas while others remain relatively normal.
These patches of thin bone are described as osteolytic lesions.
What can myeloma bone disease lead to?
Pathological fractures
What is the cause of hypercalcaemia in myeloma?
Increased osteoclast activity causing calcium reabsorption
What are plasmactyomas?
• Plasmacytomas are individual tumours formed by cancerous plasma cells.