Male, 4 months old, with history of anterior fontanelle hemangioma. A lobular scalp lesion is evident overlying the anterior fontanelle which measures 37 x 29 mm in the axial plane and 12 mm in thickness. The lesion involves the scalp only with no clear involvement of the underlying bone and no invasion of the intracranial space. The lesion is mildly T2 hyperintense and heterogeneously T1 hypointense. There are vessels coursing adjacent to and within the lesion.On limited MRI sequences, the brain itself demonstrates normal morphology and signal characteristics. The pattern of white matter myelination is appropriate for age. No focal parenchymal signal abnormality is seen. No abnormal extra axial fluid collections are detected. The ventricles are normal in size and morphology.
A vascular scalp lesion is evident overlying the anterior fontanelle which does not clearly involve the underlying bone or the intracranial space. As on the prior ultrasound, this lesion would be compatible with a hemangioma.