Neonatal posterior fossa subdural hematoma.
Hemorrhage into the posterior fossa is a rare neurosurgical emergency in neonates. CT scanning is diagnostic. Blood layering under the apex of the tentorium cerebelli, however, may resemble a dilated vascular structure, and the rigidity of the pressured tentorium may prevent upward transmission of increased intracranial pressure, resulting in a soft fontanelle.
D003388:Cranial Fossa, Posterior; D006408:Hematoma, Subdural / Q000000981:diagnostic imaging*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D014057:Tomography, X-Ray Computed