Muscle weakness (generalized) [M62.81], Reason for Study: ^Reason: left6 weakness etiology History: left arm weakness There is a focal restricted diffusion on the right precentral gyrus.On gradient echo image, there is focal susceptibility lesion anterior portion of the restricted diffusion. However, this is more likely represent a partial volume effect of adjacent cortical vein, the chance of hemorrhagic transformation is low.Underlying brain shows multifocal scattered FLAIR/T2 high signal intensity lesions on bilateral periventricular white matter indicating non specific small vessel ischemic disease.The ventricles, sulci and cisterns are symmetric and unremarkable. There is no mass, mass effect, edema, midline shift, intra or extra-axial fluid collection/hemorrhage, or restricted diffusion/acute ischemia. 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.
1. Acute ischemic infarction, right precentral gyrus most likely without hemorrhagic transformation.2. Non specific small vessel ischemic disease.