Presentation
Headache since many months.
Patient Data
A fairly well-defined hyperintense lesion with peripheral T2 hypointense margins is noted involving the medulla oblongata without any significant edema. The lesion also extends to fourth ventricle lumen without any obstructive hydrocephalus.
CT scan done earlier showed heterogenously hyperdense lesion in the brainstem.
Case Discussion
Cavernomas also known as cerebral cavernous venous malformations are the commonest type of intracranial vascular malformations. They are angiographically occult. No feeding artery or draining veins. They show characteristic popcorn appearance with peripheral rim of hypointense signals and internal areas of blooming. Most of them are treated conservatively.
Differentials are hemorrhagic metastases or primary hemorrhagic brain tumors.