Increased severity headache symptoms. History of LCH, s/p OLT. On head CT 9/30, a lucent lesion concerning for LCH reactivation was seen at R occipital skull. The images are degraded by dental brace artifact, particularly in the anterior region. There is an enhancing focus near the midline of the occipital bone that measures up to 12 mm. There is no evidence of intracranial hemorrhage or acute infarct, within the limitations of artifact. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact.
An enhancing focus near the midline of the occipital bone that measures up to 12 mm is nonspecific. The images are otherwise degraded by dental brace artifact, particularly in the anterior region.