"On CT, tuberculomas may appear as a round or lobulated nodule with moderate to marked oedema. Either solid or ring enhancement is typical post-contrast. A central focus of calcification with a ring of peripheral enhancement (the "target sign") is described but is not specific to tuberculosis 7. When calcification is present (the minority of cases) it tends to be larger than that calcification seen in neurocysticercosis."
"On CT, tuberculomas may appear as a round or lobulated nodule with moderate to marked oedema. Either solid or ring enhancement is typical post-contrast. A central focus of calcification with a ring of peripheral enhancement (the "target sign") is described but is not specific to tuberculosis 7. When calcification is present (the minority of cases) it tends to be larger than that calcification seen in neurocysticercosis."
"T1: iso- to- hypointense"
"T2: hyperintense"
"FLAIR: no suppression"
"DWI/ADC: no restricted diffusion"
"T1 C+ (Gd): homogeneous enhancement"
"T1: iso- to- hypointense with hyperintense rim"
"T2:"
"FLAIR: no suppression"
"DWI/ADC: no restricted diffusion"
"T1 C+ (Gd): homogeneous or ring-enhancement"
"T1: iso- to- hypointense with hyperintense rim"
"T2: "
"FLAIR: partial suppression"
"DWI/ADC: variable diffusion restriction"
"T1 C+ (Gd): ring enhancement"
"T1: iso- to- hypointense"
"T2: hypointense"
"FLAIR: no suppression"
"DWI/ADC: no restriction"
"T1 C+ (Gd): no enhancement"
"T1: iso- to- hypointense"
"T2: hyperintense"
"FLAIR: no suppression"
"DWI/ADC: no restricted diffusion"
"T1 C+ (Gd): homogeneous enhancement"
"T1: iso- to- hypointense with hyperintense rim"
"T2:"
"hypointense representing gliosis and abundant monocyte infiltration 1"
"FLAIR: no suppression"
"DWI/ADC: no restricted diffusion"
"T1 C+ (Gd): homogeneous or ring-enhancement"
"MR spectroscopy"
"T1: iso- to- hypointense with hyperintense rim"
"T2: "
"hypointense rim with central hyperintensity"
"FLAIR: partial suppression"
"DWI/ADC: variable diffusion restriction"
"T1 C+ (Gd): ring enhancement"
"T1: iso- to- hypointense"
"T2: hypointense"
"FLAIR: no suppression"
"DWI/ADC: no restriction"
"T1 C+ (Gd): no enhancement"
"decrease in NAA/Cr"
"slight decrease in NAA/Cho"
Expected headings
"Non-caseating granuloma"
"Caseating granuloma"
"Caseating granuloma with central liquefaction"
"Calcified granuloma"
"MRI is the modality of choice in assessing potential tuberculomas. Although the appearance can be classical and highly suggestive of the diagnosis (central low T2 signal, surrounding enhancement and oedema) it does, however, vary with the stage of disease 1,3,8,9. In some instances, when liquefactive necrosis occurs central, the imaging appearances are essentially indistinguishable from a tuberculous abscess, which in turn is similar to pyogenic cerebral abscesses 4."