Brain magnetic resonance imaging results indicated 3 lesions with high intensity on T2-weighted images and irregular ring enhancement
. The lesions were in the right frontal lobe (diameter 15.6 mm), left globus pallidus (diameter 17.5 mm), and body of the caudate nucleus extending to the left thalamus (diameter 16.2 mm; Figure, panel A).
Tumefactive demyelinating lesions are characterized as mass-like lesions with or without ring enhancement
on contrast-enhanced MRI.
was predictive of benign lesions, whereas heterogeneous enhancement was helpful for detecting malignant lesion.
The results suggested that ring enhancement
was a predictor of benign lesions, whereas heterogeneous enhancement was a useful indicator of malignant lesions.
Contrast enhanced T1-weighted images showed ring enhancement
in solid component and peripheral wall (Figure 1).
Lehman, "Intradural lumbar disk fragment with ring enhancement
on MR," American Journal of Neuroradiology (AJNR), vol.
Most lesions showed delayed nodular and incomplete ring enhancement
T1-hypointensity or halos were seen in 2 cases.
1), the other lesion was 2.5 cm in diameter and showed clustered ring enhancement
. The papillary lesion with atypia that upgraded to DCIS had a linear clustered NME pattern.
CT scan sometimes shows large cysts with ring enhancement
causing compression of the adjacent structures and simultaneously the patient is symptomatic.
Fist-like or lumpy enhancement is frequently seen in people with normal immunity; whereas patients with immunodeficiency usually shows ring enhancement
is not specific for pyogenic abscess and may be seen in other conditions such as nonpyogenic abscess, high grade neoplasm, primary central nervous system lymphoma, metastasis, infarct, hematoma, thrombosed giant aneurysm, radiation necrosis, demyelinating disease, and Toxoplasmosis gondii infection.
These lesions demonstrated no enhancement to incomplete ring enhancement
, with diminished vasogenic oedema (A).