Meningocele M agnetic resonance imaging revealed a 1.5-cm cystic scalp lesion in the midline just superior to the cerebellum. Its enhancement paralleled the cerebrospinal fluid enhancement on all sequences, and it overlaid a skull defect. Craniectomy and excision revealed a meningocele. Most scalp lesions are benign; however, up to 37% of solitary, nontraumatic scalp nodules extend intracranially to the dura mater or brain. 1 A midline location suggests embryologic abnormalities with potential for intracranial communication. At 3 to 5 weeks of development, the cranial neural tube fuses at the midline, followed by separation of the surface ectoderm away from the neural tube. 2 Defective midline fusion results in dysraphism. The differential diagnosis for a congenital midline scalp nodule includes cephaloceles, dermoid cysts, and heterotopic brain tissue in addition to more common entities such as hemangiomas and lipomas. Similarly, a midline scalp ulceration raises concern for aplasia cutis congenita (ACC) and underlying embryologic malformation.