BRAIN: CT or MRI of Masses in Specific Locations

A-60Multiple Enhancing Lesions in the Cerebrum and Cerebellum (CT, MRI)
A-61Ring-Enhancing Lesion (CT, MRI)
A-62-1MRI Intensity of Intracranial Lesions - Hyperintense T1, Hyperintense T2
A-62-2MRI Intensity of Intracranial Lesions - Hyperintense T1, Hypointense T2
A-62-3MRI Intensity of Intracranial Lesions - Hypo- to Isointense T1, Hypointense T2
A-62-4MRI Intensity of Intracranial Lesions - Isointense T1, Isointense T2
A-62-5MRI Intensity of Intracranial Lesions - Homogeneous Water Signal, Very Hypointense T1, Very Hyperintense T2
A-62-6MRI Intensity of Intracranial Lesions - Isointense or Hypointense T1, Hyperintense T2
A-62-7MRI Intensity of Intracranial Lesions - Inhomogeneous Water Signal, Hypointense T1, Hyperintense T2
A-62-8MRI Intensity of Intracranial Lesions - Gyriform Cortical/Subcortical Hypointense T2 on High Field MRI
A-62-9MRI Intensity of Intracranial Lesions - Gyriform Cortical/Subcortical Hyperintense T1
A-62-10MRI Intensity of Intracranial Lesions - Gyriform Cortical Hyperintense T2 with Parenchymal Lesions
A-62-11-SMRI Intensity of Intracranial Lesions - Black Signal
A-62-12MRI Intensity of Intracranial Lesions - Hypointense Rings
A-63Sellar and Parasellar Masses on CT or MRI
A-64Enhancing Sellar and Suprasellar Lesions on CT or MRI
A-65-1Sellar or Suprasellar Mass with Low Attenuation on CT
A-65-2Sellar or Suprasellar Mass with Equal (Isodense) or Mixed Attenuation on CT
A-65-3Sellar or Suprasellar Mass with High Attenuation on CT
A-65-SVisual Estimation of CT Attenuation and Enhancement in Various Sellar and Parasellar Lesions
A-66Hypothalamic Lesions on MRI or CT
A-67Mass Involving the Jugular Foramen on MRI with Enlargement of the Jugular Canal
A-68Mass or Abnormal Enhancement of the Trigeminal Nerve on CT or MRI
A-69Mass in the Middle Fossa on CT or MRI with Expansion or Erosion of the Middle Fossa Floor
A-70Mass or Destructive Lesion Involving the Clivus, Prepontine Cistern Area, or Posterior Skull Base on CT or MRI
A-71Extra-axial Masses and Fluid Collections
A-72Midline Supratentorial Tumors or Cysts
A-73Cystic Brain Tumor with a Mural Nodule
A-74Intraventricular Tumor or Cyst
A-75Ventricular Wall Nodule(s)
A-76Widening of the Septum Pellucidum (more than 3 mm)
A-77-1Mass Involving the Trigone and Atrium of the Lateral Ventricle
A-77-2Mass Involving the Body of the Lateral Ventricle
A-78-1Mass Involving the Foramen of Monro and/or the Anterior Recess and Inferior Third Ventricle
A-78-2Mass Involving the Body or Posterior Portion of the Third Ventricle
A-79Pineal Area Mass
A-80-1Infratentorial (Posterior Fossa) Lesions on CT or MRI - Fourth Ventricle (Intraventricular) Lesions
A-80-2Infratentorial (Posterior Fossa) Lesions on CT or MRI - Cerebellar (Parenchymal) Lesions
A-80-3Infratentorial (Posterior Fossa) Lesions on CT or MRI - Other Posterior Fossa Lesions
A-81Cerebellopontine Angle Mass on CT or MRI
A-82Posterior Fossa Tumors in Children (over 1 Year of Age) (CT, MRI)
A-83Cystic or Necrotic Mass in the Posterior Fossa (CT, MRI, Ultrasound)
A-84Obstruction at the Fourth Ventricle Outlet
A-85Enlarged Brain Stem
A-86Low Attenuation (Hypodense) Lesion in the Brain Stem on CT (also Hypointense on T1 MRI)