I - Define the Lesional Intensity on MR:
Dark T1 - Bright T2 Dark T1 - Dark T2 Dark T1 - Iso T2 Bright T1 - Dark T2 Bright T1 - Bright T2 Iso T1 - Bright T2 Iso T1 - Dark T2 Iso T1 - Iso T2 Fluid Level Mixed Intensity Cystic Intensity Signal Void Hypointense Rim on T2

II - Specify the Location of the Lesion:
Brain Parenchyma Nonspecific Location Subependymal Periventricular Cortical Cortical Medullary Junction Basal Ganglia Midbrain Suprasellar Cistern Sellar/Suprasellar Region Hypothalamic Region 3rd Ventricle Pons & Medulla Pineal Region Lateral Ventricle Intravascular Region Cerebellum White Matter 4th Ventricle Foramen of Monro Corpus Callosum

III - Does the Lesion Have a Mass Effect?
Yes No

IV - Indicate the Type of Contrast Enhancement:
No Enhancement Enhancement Ring Enhancement Nodular Enhancement Not Known

V - Is the Lesion Associated with Calcification?
Yes No Not Known

VI - Lesion's CT Density Irrespective of Calcification:
Hyper Hypo Iso Mixed Not Known

VII - Is There Significant Perilesional Edema?
Yes No

VIII - Does the Lesion Have Well Defined Margins?
Yes No Not Known

IX - Indicate the Multiplicity of the Lesion:
Single Multiple

X - Specify the Lesion Size without Accounting for Edema:
2 cm or Less Over 2 cm

XI - Is There Hydrocephalus or Ventriculomegaly?
Yes No

XII - Is There Intra-Cystic Mural Nodule Present? (Applies to Cystic Lesions)
Yes No