Week 2 Overview of Neuropathology (NS Response to Injury) Flashcards

1
Q

Developmental

A

Onset: At birth

Duration: Static

Focality:

Cellular changes: Neuralation or neuronal migration abnormalities

Other Clues: Folate deficiency (valproate)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Trauma

A

Onset:

Duration: Static

Focality: Yes

Cellular changes: Tissue disruptio, axonal spheroids , petechial hemorhhage (contusion); cell death

Other Clues: Trauma history, suspicious history for pediatric non-accidental trauma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Cerebro-Vasular

A

Onset: Acute

Duration: Static

Focality: Vascular distribution

Cellular changes: Ischemia and or hemorrhage neurons > neutrophils > macrophages (cavitation)

Other Clues: Risk factors, cardiac arrythmias, atheroscleorisis, hypertension

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Toxic metabolic

A

Onset: subacute

Duration:

Focality: usually global (rarely focal or systemic)

Cellular changes: Alzheimer’s tyoe II astricytes with hepatic encephalopathy

Other Clues: Drugs, vitamin deficiency

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Neoplastic

A

Onset: subacute

Duration: progressive

Focality: usually focal (or regionally infiltrative)

Cellular changes: Atypia, mitoses

Other Clues: Imaging

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Infectious

A

Onset: subacute

Duration: progressive

Focality: sometimes

Cellular changes: Inflammatory cells, organisms and inclusions (viral)

Other Clues: CSF, fever, history

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Neurodegenerative

A

Onset: chronic

Duration: progressive

Focality: Systems (ie motor; extrapyramidal; cognitive)

Cellular changes: Neuronal loss, gliosis, includions

Other Clues: protein abnormality in cells, genetic risk factors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Amytrophic lateral sclerosis clues

A

Symptoms would be related to the motor system (corticospinal tracts)

onset and duration would be slowly progressive

pathologic changes including neuronal loss and gliosis would be degenerative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Middle cerebral artery stroke clues

A

Symtoms would be focal (ie MCA distribution)

onset would be abrupt

pathologic changes would be ischemic

Include shrunken eosinophilic neurons acutely and later macrophages and gliosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Neuron

A

most vulnerable cell

limited regeneration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Astrocyte

A

Major reactive cell of CNS (infarcts, neurodegenerative, infectious, ext)

proliferative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Oligodendrocyte

A

myelinated axonal processes

highly vulnerable (ie multiple sclerosis)

limited proliferation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Ependymal cell

A

lines ventricles

vulnerable

limited regeneration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Vascular disease cellular response

A

atherosclerosis, thrombosis, infarction/ eosinophilic neuronal necrosis

Red is dead = hypoxic, ischemic changes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Neoplastic cellular response

A

Unregulated proliferation of atypical cells due to tumor suppressor gene mutation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Neurodegenerative cellular response

A

Neuronal loss

gliosis

specific or non-specific inclusions (ie fibillary phosphotau positive inclusions; alzheimers or other neurodegenerative tauopathy)

17
Q

Neurodegenerative cellular response 2

A

neuronal loss

subsequent loss of myelinated fibers in corticospinal tracts

ALS

18
Q

Normal physiology

A

neuromelanin pigment

normal findings sumstantia migra/ locus ceruleus

19
Q

Congenital inborn errors of metabolism cellular response

A

abnormal material within cytoplasm of neurons

neuronal storage diseases

20
Q

Autoimmune cellular response

A

T cell inflammation

demyelination

macrophages

multiple sclerosis

21
Q

Trauma cellular response

A

diffuse axonal injury shearing of axons/ vessels

axonal spheroids

hemorrhage

22
Q

Toxic/ metabolic cellular response

A

alzheimers type II astrocytosis = hepatic encephalopathy

23
Q

Infectious cellular response

A

Bacterial = neutrophils

Viral = microglial nodules/ lymphocytes

fungal = granulomas

24
Q

rosenthal fibers

A

an be reactive (ie wall of a syrinx) or related to a pilocytic astrocytoma (pediatric tumor)

25
Q

Causes of increased intercranial pressure

A

increased tissue: tumors

increased blood : hemorrhage, venous comgestion

increased water: hydrocephalus, cerebral edema (ie with infarction)

26
Q

Types of hermiation

A

1) subfalcine (cingulate)
2) transtentorial (uncal)
3) tonsillar (foramen magnum) and upward cerebellar herniation
4) extracranial = transcalvarial = external herniation

27
Q

Consequences of increased intercranial pressure

A

headache

herniation

pupillary dilation (uncal herniation)

duret hemorrhage

death

28
Q

non communicating hydrocephalus

A

Obstruction to CSF flow hinders the free passage of CSF through the ventricular system and subarachnoid space (eg stenosis of the cerebral aqueduct or obstuction if interventricular foramina)

secondary to tumors, hemorrhages, infections or congential malformations

can cause increases in CNS pressure

29
Q

Communicating hydrocephalus

A

non obstructive hydrocephalus

caused by impaired CSF reabsorption in the abswence of any CSF flow obstruction between the ventricles and subrachnoid space

it has been theorized that this is due to functional impairment of the arachnoidal granulations which are located alone the superior sagital sinus and is the site of the CSF resorption back into the venous system

Various neurologic conditions