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Frustration occurs when people are obstructed or prevented from achieving a desired goal or fulfilling a perceived need. For example, when someone's input is ignored in a discussion, it can lead to feelings of frustration. Conflict, however, arises from opposing interests, goals, or actions. Conflicts can take various forms based on the nature of these opposing desires or goals.
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At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
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The actuarial approach, a statistical method originally developed for life insurance risk assessment, is widely used to calculate survival rates in clinical and population studies. This method accounts for participants lost to follow-up or those who die from causes unrelated to the study, ensuring a more accurate representation of survival probabilities.
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The information-processing theory of cognitive development centers on fundamental mental processes, including attention, memory, and problem-solving skills. Researchers in this field examine how cognitive abilities, such as working memory, evolve and influence children's overall development. Studies indicate that children with stronger working memory tend to excel in reading comprehension, math, and problem-solving compared to peers with less efficient memory skills. Low working memory is...
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Brain Tectal Tumors: A Flexible Approach.

Alessandro Perin1,2,3, Tommaso Francesco Galbiati1,3, Cecilia Casali1

  • 1Neurosurgery Department, Fondazione IRCCS Istituto Neurologico Nazionale "C. Besta," Milan, Italy.

Operative Neurosurgery (Hagerstown, Md.)
|June 7, 2018
PubMed
Summary

This study highlights a minimally invasive endoscopic approach for adult tectal gliomas, enabling simultaneous cerebrospinal fluid diversion and biopsy. This technique offers a safe method for obtaining histopathological diagnosis in midbrain tumor patients.

Keywords:
Endoscopic third ventriculostomyFlexible neuroendoscopyTectal plate gliomas

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Area of Science:

  • Neurosurgery
  • Oncology
  • Pediatric Neurosurgery

Background:

  • Mesencephalic tectal gliomas are midbrain tumors, more common in children, often presenting with obstructive hydrocephalus.
  • Their slow progression typically leads to a good prognosis, but hydrocephalus can worsen outcomes.
  • Standard treatment involves cerebrospinal fluid diversion, potentially with biopsy.

Observation:

  • Two adult cases of tectal gliomas are presented, treated with a novel endoscopic technique.
  • This approach combined endoscopic third ventriculostomy (ETV) and simultaneous endoscopic biopsy through a single burr hole.
  • A flexible endoscope was utilized for enhanced maneuverability and visualization.

Findings:

  • The described endoscopic technique allows for safe ETV and subsequent biopsy during the same procedure.
  • Surgeons can assess the feasibility of biopsy after ETV, minimizing patient risk.
  • Histopathological diagnosis was achieved, providing crucial information for patient management.

Implications:

  • Recommends the use of flexible endoscopy as an effective tool for managing adult tectal gliomas.
  • Suggests this approach can improve diagnostic yield and treatment planning for these rare tumors.
  • Highlights the potential for minimally invasive neurosurgical techniques in adult midbrain tumors.