Tumors and Infections Flashcards
primary vs secondary tumors
primary - from the CNS
secondary - metastatic
what are the most common cancer types in children?
brain and CNS tumors
(2nd most frequent cause of death)
are most CNS tumors primary or secondary?
secondary - metastases
what CNS tumors are seen in adults?
megingioma
gliobastoma
70% of tumors in children are located where?
posterior fossa
70% of tumors in adults are located where?
cerebral hemispheres
sx of tumor in posterior fossa
ataxia, HA, increased ICP, CN sx
generalized CNS tumor sx are related to
increased ICP
sx of frontal lobe tumors (31%)
clinically silent
personality changes
non-fluent aphasia (dominant)
urinary frequency & urgency
seizures
hemiparesis
sx of temporal lobe tumors (32%)
seizures
memory disturbance
superior quadrantanopia
fluent aphasia (dominant)
sx of temporoparietal lobe tumors (7%)
fluent aphasia (dominant)
or conduction
sx of occipital parietal lobe tumors (5%)
homonymous hemianopsia
visual seizures
visual agnosias
sx of frontoparietal lobe tumors (11%)
hemiparesis
hemisensory loss
non-fluent aphasia (dominant)
sx of parietal lobe tumors (10%)
hemisensory loss
non-fluent aphasia (dominant)
hemineglect (nondominant)
anosognosia (nondominant)
hemiparesis
homonymous hemianopsia or visual neglect
sx of increased ICP
HA
nausea
papilledema (MD look at fundus)
how do increased ICP HAs present?
dull
worse in AM
worse with bending over
seen in 50% of pts with brain tumors
what is the Monro-Kellie doctrine?
sum of volume of CSF, blood, and brain is constant in enclosed hard skull
what structure plays a key role in herniation syndromes?
dural septa
which artery is compressed with cingulate herniations?
ACA
what structures are affect in uncal herniation?
hippocampus and uncus
pushed down
sx of uncal herniation
ipsilateral fixed and dilated pupil (CN III)
impaired consciousness
hemiparesis
PCA infarcts
sx of uncal herniations are due to pressure on
tentorial notch
what is compressed with tonsilar herniations?
4th ventricle
medulla
sx of tonsilar herniation
stiff neck
progresses to decerebrate posture and coma
what is the optimal diagnostic tool to use for CNS tumors?
MRI w/wo contrast
which spinal tumors arise from primitive cells?
medulloblastomas
list glioma classification in order form best to worst prognosis
1) pilocytic astrocytoma
2) low grade astrocytoma
3) anaplastic astrocytoma
4) glioblastoma
astrocytomas usually present with (sx)
HA and seizures
favorable prognosis factors for astrocytoma
younger age
seizure as only sx
smaller tumor size
sx of glioblastoma
focal signs
cognitive changes
increased ICP
what meds can be given to reduced ICP?
steroids
(dexamethasone, mannitol)
T/F: glioblastomas usually always return
T
what can indicate the tumor is back for glioblastomas?
new seizure