 There is a focal calvarial defect at the expected location of the confluence of sagittal and lambdoid sutures which is primarily midline with a slight left paramedian extension. This clinically measures 2 x 2 centimeters, with MRI findings supporting that. There does appear to be exposed dura, and flow is maintained in the normal appearing adjacent superior sagittal sinus. The adjacent brain parenchyma appears unremarkable without congenital anomaly.The ventricles and sulci are normal in size. The cerebellar tonsils are in normal position. There are no masses, mass effect or midline shift. The pituitary gland is normal in size. There is no evidence for intracranial hemorrhage or acute cerebral, brainstem or cerebellar infarction. No diffusion-weighted abnormalities are identified. Myelination is appropriate for the provided age. There are no extraaxial fluid collections or subdural hematomas. Flow voids are present within the major vessels indicating patency. The mastoid air cells are clear.
There is a focal calvarial defect at the expected location of the confluence of sagittal and lambdoid sutures which is primarily midline with a slight left paramedian extension. This could be better delineated with CT if further anatomic definition is deemed clinically beneficial. There does appear to be exposed dura, and flow is maintained in the normal appearing adjacent superior sagittal sinus. The adjacent brain parenchyma appears unremarkable without congenital anomaly. There are no MRI findings of atretic cephalocele.