Background and recommendations Flashcards
What are the 3 neuroblastic histologies? How to they differ?
- Neuroblastoma
- Ganglioneuroblastoma
- Ganglioneuroma
They differ based on the degree of cellular maturation
What is the median age of NB?
17 months
What are genetic syndromes associated with neuroblastoma?
- NF
- Hirschsprungs disease
- Fetal hyantoin syndrome
What histologic markers distinguish NB from other small round blue cell tumors?
- Neuron-specific enolase
- Synaptophysin
- Neurofilament
What percentage of patients with NB have positive urine catecholamines.
90%
What percentage of patients present with metastatic disease?
75%
What imaging is needed for work up?
Abdominal US
CT scan of the chest/abdomen/pelvis
MRI of abdomen/liver/spine
I-131 MIBG scan
What tissue diagnosis is needed at work up?
BM bx
Resection
INSS Stage 1?
Unilateral, localized tumor s/p R0 or R1 resection LN negative (separate from primary specimen)
INSS Stage 2?
2A: Unilateral, R2 resection, LN negative (separate from primary specimen)
2B: Unilateral, with involved ipsilateral nodes
INSS Stage 3?
Unresectable localized tumor extending past midline
or unilateral tumor with contralateral nodes
INSS Stage 4
Distant disease except that listed for 4S
INSS Stage 4S
Distant disease to the skin, liver, and or < 1 year old.
What are the most important factors for patients with NB?
Age
Stage at diagnosis
What are the factors that classify patients into different risk groups?
- Stage, INSS
- Age
- N-myc status
- DNA ploidy
- Shimada classification
SANDS
What factor makes a patient with 4S high risk?
N-myc amplification
Dose constraint for contralateral kidney?
Entire kidney < 15 Gy
Dose constraint for liver?
V15 < 66%