BRAIN: Patterns on CT or MRI (Other than Masses)

A-87Subdural Empyema on CT or MRI
A-88-1Rim or Linear Enhancement of the Brain Surface or Meninges on CT or MRI
A-88-2Diffuse Gyriform Meningeal Enhancement on CT or MRI (indicates disseminated leptomeningeal disease)
A-88-3Localized Gyriform Meningeal Enhancement on CT or MRI
A-89Ependymal and Subependymal Enhancement of Ventricular Margins, Cisterns, and Subarachnoid Spaces on CT or MRI
A-90-1Increased Density within the Basilar Cisterns on nonenhanced CT
A-90-2Intense Enhancement of the Basilar Cisterns on CT
A-91-1Intracranial Fat Lucency on CT or MRI
A-91-2Intracranial Air Lucency (Pneumocephalus) on Plain Films, CT, or MRI
A-92Common Congenital Malformations of the Brain on CT or MRI
A-93Infections and Inflammation of the Brain and Meninges Identifiable on CT or MRI
A-94Degenerative and Metabolic Disorders of the Brain (MRI)
A-95-1White Matter Disease of the Brain on CT or MRI - Dysmyelinating Diseases (Abnormal Myelin Formation or Maintenance)
A-95-2White Matter Disease of the Brain on CT or MRI - Demyelinating (Myelinoclastic) Diseases
A-96Periventricular Hyperintense (Bright) Lesion on T2 MRI
A-97Periventricular Hypodense Lesion on CT
A-98Cerebral Infarction (Stroke) on CT, MRI, or Angiography
A-99Intracerebral Hemorrhage or Hematoma on CT, MRI, or Angiography
A-99-STime Staging of MRI Appearance of Cerebral Hematoma
A-100Subarachnoid Hemorrhage