Myeloma Flashcards
What is Myeloma?
Cancer of plasma cells
What are Plasma cells?
Type of B lymphocyte that produces antibodies
Why are B cells called that?
They are found in Bone marrow
What happens in Myeloma?
Specific type of plasma cell affected –> specific antibody produced in large quantities
What is Multiple Myeloma?
Myeloma affects multiple parts of body
What are the main types of Antibodies? (5 things)
- A
- G
- M
- D
- E
(In Myeloma, one of these will be super high)
What antibody type is most commonly raised in Myeloma?
IgG (more than 50%)
How does Myeloma affect the blood? (3 steps)
- Cancerous plasma cells invade bone marrow (Bone marrow infiltration)
- Suppression of blood cell dev
- Anaemia (low RBC) + Neutropenia (low neuts) + Thrombocytopaenia (low plat)
What are some specific diseases that Myeloma causes? (2 things)
- Myeloma bone disease
- Myeloma renal disease
What it the Pathophysiology of Myeloma bone disease? (2 steps)
- Cytokines released from Plasma cells + Stromal cells
- Increased osteoclast activity + Suppressed osteoblast activity
What are the most common places for Myeloma bone disease to happen? (4 things)
- Skull
- Spine
- Long bones
- Ribs
What can happen in the weak parts of Myeloma bone disease bones?
Pathological #s
What does the increases Osteoclast activity in Myeloma bone disease lead to?
Beh calcium reabsorbed from bone –> Hypercalcaemia
What is the Pathophysiology of Myeloma Renal Disease? (3 things)
- High levels of antibodies –> block flow thru tubules
- Hypercalcaemia –> impaires renal function
- Dehydration
What are the CF of Myeloma? (4 things)
- Calcium raised
- Renal failure
- Anaemia
- Bone lesions / pain
CRAB
What types of Anaemia can you get in Myeloma? (2 things)
- Normocytic
- Normochromic
What are the RF of Myeloma? (5 things)
- Age
- Male
- Black African ethnicity
- FHx
- Obesity
When does NICE recommend you sus Myeloma? (2 things)
Over 60 with:
1. Persistent bone pain (esp back pain) // OR
2. Unexplained #s
What initial investigations should you do in sus Myeloma? (4 things)
- FBC
- Calcium
- ESR
- Plasma viscosity
What will the FBC show in Myeloma?
Low WBC
What will the Calcium test show in Myeloma?
Raised calcium
What will the ESR test show in Myeloma?
Raised ESR
What will the Plasma viscosity test show in Myeloma?
Raised plasma viscosity
What urgent investigations should you do if initial investigations are positive (or you still sus Myeloma)? (2 things)
- Bence-Jones protein
- Light chain assay (serum-free)
- Immunoglobulins (serum)
- Protein electrophoresis (serum)
BLIP
What investigation should you do to confirm Myeloma Dx?
Bone marrow biopsy
What investigations should you do to assess for bone lesions? (3 things)
- MRI
- CT
- Skeletal survey (XR of full skeleton)
Only need 1 of them
What will you see on a XR of Myeloma? (2 things)
- Lytic (punched out) lesions
- “Raindrop skull” (bc many lytic lesions)
What is the FIRST line Mx option for Myeloma? (4 things)
Combination of Chemo with:
1. Bortezomid
2. Thalidomide
3. Dexamethasone
What is a CLINICAL TRIAL Mx option of Myeloma?
Stem cell transplantation
(only done when pt are suitable)
What is a CLINICAL TRIAL Mx option of Myeloma?
Stem cell transplantation
(only done when pt are suitable)
What do you need to add when giving certain chemo regimes (e.g Thialidomide)?
Aspirin (bc high risk of VTE)
What are the Mx options for Myeloma one disease? (4 things)
- Bisphosphonates
- Radiotherapy
- Orthopaedic surgery
- Cement augmentation
How do Bisphosphonates work in Myeloma bone disease Mx?
Suppress osteoclast activity
How does Radiotherapy work in Myeloma bone disease Mx?
Improve bone pain
How does Orthopaedic surgery work in Myeloma bone disease Mx? (2 things)
- Stabilise bone
- Treat #s
What is Cement augmentation?
Injecting cement into vertebral #s / lesions
How does Cement augmentation work in Myeloma bone disease Mx? (2 things)
- Improves spine stability
- Relieves pain
What are the complications of Myeloma / its Tx? (8 things)
- Inf
- Pain
- Renal failure
- Anaemia
- Hypercalcaemia
- Peripheral neuropathy
- Spinal cord compression
- Hyperviscosity