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[Clinical and experimental study on false lateralizing sign (author's transl)]
No Shinkei Geka. Neurological Surgery
|October 1, 1978
Summary
False lateralizing signs (FLS) in infratentorial tumors occur due to elevated counter pressure. This physical mechanism can compress contralateral cranial nerves, leading to misleading neurological assessments.
Area of Science:
- Neurosurgery
- Neurology
- Medical Physics
Context:
- Infratentorial tumors present diagnostic challenges.
- False lateralizing signs (FLS) can complicate neurological examinations.
- Understanding the pathophysiology of FLS is crucial for accurate diagnosis.
Purpose:
- To investigate the incidence of false lateralizing signs in infratentorial tumors.
- To elucidate the mechanism behind false lateralizing signs.
- To propose a physical explanation for the occurrence of FLS.
Summary:
- A clinical study of 57 infratentorial tumor cases revealed an FLS incidence of 19.2%.
- Higher incidences were noted in cerebellopontine angle (31.5%) and cerebellar hemisphere (23.8%) tumors.
- Three-dimensional experiments demonstrated that tumor-induced counter pressure can compress contralateral cranial nerves, explaining FLS.
Impact:
- Provides a physical mechanism for false lateralizing signs in posterior fossa tumors.
- Enhances understanding of neurodiagnostic challenges associated with infratentorial lesions.
- Aids clinicians in interpreting neurological findings in the presence of infratentorial masses.