Surgery - Neurosurgery Flashcards
SUR - 7.1
Which clinical picture associates with the following symptoms? Sudden occipital headache, photophobia, fever, neck stiffness.
A) Acute subdural hemorrhage
B) Intracerebral hemorrhage
C) Posterior fossa tumor
D) Subarachnoid hemorrhage
E) Migraine
ANSWER
D) Subarachnoid hemorrhage
EXPLANATION
The acute subdural hemorrhage (A) generally caused by a high magnitude impact of the skull therefore this syndrome can not be spontaneous and it is followed by immediate black out. The intracerebral hemorrhage (B) starts with sudden headache, but not localizing to the occipital region, it’s causing diffuse, tensive pain, in most cases progressing to deep coma with sever neurological deficits. In principle posterior fossa tumors (C) can cause occipital headache but it’s not appears suddenly, and not associates with photophobia or fever. The migraine (D) could be the most similar to subarachnoid hemorrhage but it`s not accompanied with fever. The correct answer is subarachnoid hemorrhage (D).
SUR - 7.2
What should be done with a patient with subarachnoidal bleeding?
A) Observation
B) Sending to inpatient provider institute
C) Sending to neurosurgery department
D) Asking MRI
E) Asking angiography
ANSWER
C) Sending to neurosurgery department
EXPLANATION
The subarachnoid hemorrhage is a neurosurgical type of disease, because in the background there is a treatable bleeding source. In the most cases the acute surgical treatment (acute aneurysm surgery) is the only possible choice, so the patient should be sent to the nearest neurosurgical department. Any other act is just unnecessary risk for the patient.
SUR - 7.3
The main pathologies causing trigeminal pain:
A) Intracranial tumors
B) Sclerotic plaque
C) Vascular compression of the nerve
D) Idiopathic
ANSWER
C) Vascular compression of the nerve
EXPLANATION
The leading cause of trigeminal neuralgia 90% of the cases is vascular compression. The remaining 10% is idiopathic, but there is 2% in sclerosis multiplex caused by sclerotic plaque localized in the pons. In some cases brainstem tumors, or skull base tumors can also cause trigeminal compression.
SUR - 7.5
In case of traumatic spine fracture the main purposes of the operation are the following, except for:
A) Decompression of neural elements
B) Restoration of spine statics
C) Stabilization
D) Spine stimulation
ANSWER
D) Spine stimulation
EXPLANATION
Like in the surgical treatment of one instabile segment, in the treatment of spine fracture there is also tree principle. Release of the nerve elements being under compression caused by fracture, or luxation of the vertebrae, restoration the spine statics, and stabilization of the spine
SUR - 7.6
We need to think of a stenotic spinal canal when the patient’s walking is facilitated by bending, when there is neurogenic claudication, so occurring low back pain which can radiate to the legs during walking.
A) true
B) false
ANSWER
A) true
EXPLANATION
It is a clinical observation, that in the case of a spinal stenosis (narrowing of the spinal) canal, the patient is asymptomatic, however, when walking gradually worsening pain occurs in the waist radiating into the lower extremities. Furthermore, in many cases the patient tends to lean forward when walking in order to reduce pain.
SUR - 7.7
It is necessary to prepare brain MRI when cerebellar symptoms are noticed during or after upper respiratory tract infection in childhood because of the suspicion of scala posterior tumor:
A) true
B) false
ANSWER
A) true
EXPLANATION
In childhood, tumors located in the posterior cranial fossa can often remain unnoticed for a long time. Edema associated with upper respiratory tract infections or because the child is being more carefully examined over this period, may reveal symptoms (clumsiness, gait abnormalities) that are thought to be novel or have not been attributed beforehand. In many past medical histories frequent falls, balance disorders, etc. are mentioned at a later time. Although similar symptoms may be caused by infection-related inflammation of the nervous system, it is advisable to confirm or exclude the possibility posing greater risk (i.e. tumor), hence targeted therapy can be started as soon as possible. So performing an MRI scan is justified.
SUR - 7.8
The specific symptoms in case of elderly normal pressure hydrocephalus are the following, except for:
A) gait disturbance
B) blurred vision
C) incontinence
D) memory loss
ANSWER
B) blurred vision
EXPLANATION
Symptoms of normal pressure hydrocephalus (NPH) include abnormal gait, incontinence and memory disorder.
SUR - 7.12
In case of inactive pituitary tumor, without compressive symptoms and progressive growing, the chosen treatment is the following:
A) early tumor resection by using transsphenoidal approach
B) periodic ophthalmological examination and MRI control within the confines of endocrinology care
C) radiotherapy
D) hormone substitution
ANSWER
B) periodic ophthalmological examination and MRI control within the confines of endocrinology care
EXPLANATION
In patients with a hormonally inactive and non space-occupying pituitary gland tumor, i.e. compression of the optic nerve is not present, surgical treatment is unnecessary regardless of size, regular ophthalmic and MRI followup is sufficient as part of regular endocrinological care.
SUR - 7.13
A patient with isolated head injury is transferred to the hospital with the following parameters: GCS 7, BP 130/85 mmHg, HR 75/min, oxygen saturation 97%; no space-occupying lesion is detectable in the cranial CT scan. What is to be done?
A) only observation
B) intubation, placement of ventricular drain, measurement of intracranial pressure
C) decompressive craniectomy (DC)
D) induction of barbiturate coma
ANSWER
B) intubation, placement of ventricular drain, measurement of intracranial pressure
EXPLANATION
A patient who suffered traumatic brain injury and has a decreased level of consciousness with GCS ≤ 8 must be intubated, and it is recommended to measure the intracranial pressure and, if necessary, treat the increased intracranial pressure by placement of a ventricular drain and in certain cases by drainage of the cerebrospinal fluid (B).
SUR - 7.14
Spinal dysraphia (neural tube defect) can frequently present with hydrocephalus.
A) true
B) false
ANSWER
A) true
EXPLANATION
The statement is true because the neural tube defect is part of a complex developmental anomaly; therefore, the circulation and/or absorption of the cerebrospinal fluid may be disturbed. Consequently, hydrocephalus can develop, predominantly due to meningocele, meningomyelocele or Chiari malformation.
SUR - 7.15
Chronic subdural hematoma can be diagnosed based on the following symptoms: banal head injury, lack of serious headache, memory impairment and altered level of consciousness fluctuating from hour to hour:
A) true
B) false
ANSWER
A) true
EXPLANATION
The described features represent the typical signs indicating the development of a chronic subdural hematoma. This diagnosis should be taken into account even if the cerebral (or general) vascular condition of the patient raises the suspicion of a vascular origin underlying the symptoms. It should not be ignored that such patients are more likely to have frequently suffered minor head traumas without remembering those events, especially if the onset of the consequences are late
SUR - 7.16
The patient has gradually weakening lower limbs, and eventually paraplegia. Mark the least likely underlying condition.
A) parasagittal meningioma
B) cauda equina syndrome
C) spinal tumor
D) polyneuropathy
E) spinal vascular malformation
ANSWER
D) polyneuropathy
EXPLANATION
The most frequent conditions that may cause bilateral lower limb weakness or complete paralysis include: parasagittal meningioma compressing the medial part of the central gyrus, a region responsible for lower limb movement (A); a large lumbar disc hernia or lumbar space-occupying lesion, as part of the cauda equine syndrome (B), a spinal tumor of extra- or intradural (including intra- or juxtamedullary) origin that causes compression of the myelon (C); polyneuropathy, which can develop due to various pathologies, predominantly to diabetes, renal cause or toxic reaction to medication (chemotherapy); however, it rarely manifests in lower limb weakness but more commonly in lower limb hypesthesia/paresthesia (D), a spinal vascular malformation that causes ischemic lesion in the medulla and leads to loss of function (E).
SUR - 7.17
Spinal dysraphias (neural tube defects) are always associated with neurological signs.
A) true
B) false
ANSWER
B) false
EXPLANATION
Defects in neural tube closure do not necessarily associate with neurological symptoms. Just think of spina bifida, a pathology that is revealed in most of the cases as an incidental finding, affects exclusively the bony structure, and often to a minor extent.
SUR - 7.18
If the pain radiates to the medial part of the arm and the elevation or abduction of the arm leads to the disappearance of the radial pulse, we should think of the following pathology:
A) syringomyelia
B) coarctation of the aorta
C) cervical disc hernia
D) thoracic outlet syndrome
E) poliomyelitis
ANSWER
D) thoracic outlet syndrome
EXPLANATION
In the presence of the described features of cervicobrachial syndrome, it is essential for the differential diagnosis to take into account each of the possibilities listed. However, the loss of the radial pulse on elevation or abduction of the arm (a.k.a. Adson’s sign) is characteristic of only the scalenus syndrome (D).
SUR - 7.19
Acute epidural hematoma is half as dangerous as subdural hematoma considering mortality:
A) true
B) false
ANSWER
A) true
EXPLANATION
The statement is indeed true, because according to great international statistics, mortality of acute subdural hematomas is between 36-74%, while mortality of epidural hemorrhage is nowadays 9-36%. The difference is partly due to the fact that in the case of epidural hemorrhage, with modern imaging early diagnosis and rapid surgical intervention can provide a favorable outcome, partly because it doesn’t always involve severe and extensive brain damage. The development of acute subdural hematoma is a consequence of high force (speed) and in all cases involves severe brain contusion (in many cases the outcome is determined by the latter). This statement is intended to correct an earlier belief.
SUR - 7.20
Arteriovenous malformations are congenital lesions, which have lifelong bleeding risk without treatment.
A) true
B) false
ANSWER
A) true
EXPLANATION
Arteriovenous malformations are congenital, they tend to grow in the course of life and cause lifelong bleeding risk without treatment.