Haematology - Cancer Flashcards
what is myeloma?
a malignancy of plasma cells
what produces antibodies?
plasma cells
what is a paraprotein?
increased monoclonal Ig production (due to myeloma usually)
features of myeloma?
lytic bone lesions (back pain) marrow failure renal failure hypercalcaemia anaemia
why does renal failure occur in myeloma?
Tamm Horsfall protein produced
combines with free light chains
insoluble casts produced with cause a cast nephropathy
Ix for myeloma? results?
FBC (anaemia) Ca (high) U+Es/creatinine urine electrophoresis serum electrophoresis CT/MRI
Tx for myeloma?
chemo and remission
bisphosphonates
opiates
(symptomatic relief and monitoring by paraprotein level)
what is MGUS?
high paraprotein with no evidence of myeloma/organ damage
higher risk of developing myeloma
what happens in amyloidosis?
light chains produced precipitate in tissues to form an insoluble beta pleated sheet (amyloid)
features of amyloidosis?
nephrotic syndrome cardiomyopathy hepatomegaly neuropathy wt loss fatigue malabsorption
risk factors for amyloidosis?
MGUS
FHx
inflam conditions
IBD
Ix for amyloidosis?
organ biopsy with congo red staining - shows apple green birefringence under polarised light
SAP scan
who gets waldenstrom’s macroglobulinaemia?
old men
what happens in waldenstrom’s macroglobulinaemia?
disorder of cells that are an intermediate between lymphocyte and plasma cell
IgM paraprotein produced
features of waldenstrom’s macroglobulinaemia?
wt loss
hepatosplenomegaly
raynaud’s
bruising