Lymphoma Flashcards
MTS
Spleen
Liver
Bone
Kidney
CNS
Lung
Aggressive features
> 60 years
DLBCL
CNS involvement
Advanced stage
High SUV (not for HL)
Lugano I
1 LN region or lymphoid structure
Lugano and Ann Arbor II
> 2 LN regions on same side of diaphragm
Lugano and Ann Arbor III
LN regions on both sides of diaphragm
Or above diaphragm + spleen (Lugano)
Lugano IV
LN
Extranodal site
Ann Arbor IV
> 1 Extranodal site
Liver
Bone marrow
Lung
CSF
Ann Arbor I
Single lymphatic site
Nodal region
Waldeyers ring
Thymus
Spleen
Cutaneous staging
I - <10% skin surface
II - >10%
III - >1 cm
IV - erythema >80% of body surface
FDG non avid
Cutaneous
Bowel
Bone marrow
Mucosal surface
Richters transformation
CLL to DLBCL
High uptake in single lesion or SUV >10 in indolent
FDG > FLT in transformation
Threshold for biopsy
SUV 14
FDG detect bone marrow
If >30% involved
Bone marrow false positive
Systemic illness
Administration of Hematopoietic growth factor
FDG after chemo
Min 10 days
FDG True negative scan
Deintensify or discontinue therapy
Esp early HL
FDG Positive scan
Biopsy
Intensify therapy
HL negative PET
Biopsy to exclude bone marrow infiltration
Hematopoietic stimulating agents
Diffuse splenic uptake
Returns to normal after 1 month
Rituximab
Flare response
Residual mediastinal mass after therapy
Fibrosis, necrosis, inflammation (uncommon)
PET dd residual tumor vs fibrosis
Thymic rebound due to lymphatic hyperplasia
Within 6-12 months after treatment in children
PET dd residual/recurrent mass vs lymphatic hyperplasia
No FDG uptake after treatment
Predict disease free survival
SUV drop >66% after 2 cycles in DLBCL
Good prognosis