• Tumor
  • Skull base surgery is a new cross edge discipline which has been formed in recent years and primary skull base tumor has less incidence in clinical relatively. (spandidos-publications.com)
  • Preoperative magnetic resonance images, axial and sagittal views, revealing a midline posterior fossa tumor based at the clivus. (c3.hu)
  • The tumor will often affect multiple sites within the upper aerodigestive tract, frequently showing extension into the orbit (25%) or through the cribriform plate (11%) of the ethmoid sinus into the skull base. (wikipedia.org)
  • It is important to understand that, while tissues behind (or deeper than) the tumor receive almost no radiation from proton therapy, the tissues in front of (shallower than) the tumor receive radiation dosage based on the SOBP. (wikipedia.org)
  • However, this term is to be discouraged, as it implies a neoplasm or tumor, which it is not. (wikipedia.org)
  • Computed axial tomography(CT) can also be used to define the extraosseous extent of the tumor, especially in the skull, spine, ribs, and pelvis. (wikipedia.org)
  • EMECL is staged in the same manner as other non-small cell lung carcinomas, based on the TNM (Tumor-Node-Metastasis) staging system. (wikipedia.org)
  • intracranial
  • This lesion is separated into two types based on the anatomic site of presentation: Extranasal (60%): Subcutaneous bridge of nose Intranasal (30%): Superior nasal cavity Mixed (10%): Subcutaneous tissues and nasal cavity (larger lesions) Imaging studies are performed before surgery or biopsy to preclude an intracranial connection. (wikipedia.org)
  • CT scans are used by physicians specializing in treating the eye (ophthalmologists) to detect foreign bodies (especially metallic objects), fractures, abscesses, cellulitis, sinusitis, bleeding within the skull (intracranial bleeding), proptosis, Graves disease changes in the eye, and evaluation of the orbital apex and cavernous sinus. (wikipedia.org)
  • Magnetic resonance imaging (MRI) of the head provides superior information as compared to CT scans when seeking information about headache to confirm a diagnosis of neoplasm, vascular disease, posterior cranial fossa lesions, cervicomedullary lesions, or intracranial pressure disorders. (wikipedia.org)
  • neurological
  • On neurological examination, he had ataxia with a wide-based gait, hyperreflexia in his right upper and lower extremities with presence of a right Babinski sign, and emotional instability. (c3.hu)
  • If there is concern about a skull fracture, focal neurological symptoms present or worsening symptoms, then CT imaging may be useful. (wikipedia.org)
  • proton
  • The world's first hospital-based proton therapy center was a low energy cyclotron centre for ocular tumours at the Clatterbridge Centre for Oncology in the UK, opened in 1989, followed in 1990 at the Loma Linda University Medical Center (LLUMC) in Loma Linda, California. (wikipedia.org)
  • By 2010 these facilities were joined by an additional seven regional hospital-based proton therapy centers in the United States alone, and many more worldwide. (wikipedia.org)
  • brain
  • CT scans of the head can confirm a diagnosis of skull fracture or brain bleeding, but even in the emergency room such things are uncommon and not minor injuries so CT of the head is usually not necessary. (wikipedia.org)
  • clinical
  • Even in emergency situations, when a head injury is minor as determined by a physician's evaluation and based on established guidelines, CT of the head should be avoided for adults and delayed pending clinical observation in the emergency department for children. (wikipedia.org)
  • Clinical trials have shown the efficacy and safety of using CT of the head in emergency settings only when indicated, which would be at the indication of evidence-based guidelines following the physical examination and a review of the patient's history. (wikipedia.org)
  • extremely
  • Lung cancer is an extremely heterogeneous family of malignant neoplasms, with well over 50 different histological variants recognized under the 4th revision of the World Health Organization (WHO) typing system ("WHO-2004"), currently the most widely used lung cancer classification scheme. (wikipedia.org)
  • removal
  • This can include removal of the tonsils, adenoids, uvula and edge of the palate, and/or part of the base of the tongue. (wikipedia.org)
  • When removal of the base of the tongue is necessary, it can be removed in one of two ways. (wikipedia.org)
  • Entry
  • It transmits the hypoglossal nerve from its point of entry near the medulla oblongata to its exit from the base of the skull near the jugular foramen. (wikipedia.org)