Abstract
A B C Figure. MRI, axial balanced, a three-dimensional steady-state free precession T2-weighted imaging (A), FLAIR (B) and T1-post gadolinium (C), obtained at the level of the roof of the lateral ventricles show ring-shaped left lateral ventricular nodules (arrows) with no contrast enhancement.

A 34-year-old female presented at our facility with headache. The MRI showed ring-shaped lateral ventricular nodules (RSLVNs) (Figure) .
The RSLVNs are an incidental finding on MRI in patients who undergo neuroimaging mainly for headache. 1 The nature of the RSLVNs is controversial and includes neuroglial/ glioependymal cyst, inflammatory or reactive formation of ependyma, astrocytic gliosis reaction near subependymal veins, redetachment of the fused portion of coarctation of the frontal horn or a variant of subependymoma 1,2 . In the differential diagnosis, the most common pathological entities are subependymal heterotopias, usually found in patients with epilepsy and subependymal nodules in patients with tuberous sclerosis 1 .

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