Postconcussional syndrome [F07.81], Reason for Study: ^Reason: Previous non con MRI showed :marginating rt caudate nucleus was noted a 7X12X6mm area of increased signal intensity in all series of unknown significance done at OSH. To evaluate for any increase in size There is about 12mm x 7mm sized ovoid shape high signal intensity lesion at the deep white matter around the right caudate nucleus head. The lesion follows the signal intensity of gray matter on all sequences without evidence of any enhancement. There is no evidence of local mass effect.The lesion is non specific and imaging findings are not exactly matching any particular diagnosis. Diagnostic possibility include focal heterotopia, white matter disease such as demyelination. The possibility of low grade tumor cannot be completely excluded. Thus, follow up imaging about 6 months can be considered if clinically indicated. There is no evidence of acute ischemic or hemorrhagic lesion.There is no evidence of abnormal enhancement.The ventricles, sulci and cisterns are symmetric and unremarkable. The gray-white matter differentiation is normal. There is no edema, midline shift, intra or extra-axial fluid collection/hemorrhage, restricted diffusion/acute ischemia, or abnormal contrast enhancement. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
Right frontal deep white matter non enhancing lesion without mass effect as described above. Differential diagnosis include focal heterotopia, or demyelinating disease. Low grade tumor cannot be completely excluded. Follow up imaging can be considered if clinically indicated.