The mastoid view: a different approach to the ultrasound exploration of neonatal brain.

Objectives. We aimed to determine whether imaging through the mastoid fontanelle improves the accuracy of the standard sonographic examination, and evaluate for how long this approach is feasible after the first month of life. Methods. Therefore, for 4 months, we performed a prospective study of 32 neonates admitted to our neonatal intensive care and of 33 outpatients evaluated during follow-up visits. Results. We describe a cranial ultrasound scan approach that allows, by mastoid view, a detailed exploration of the posterior fossa structures and midbrain. Conclusions. We describe several pathological findings detected with this approach and discuss some limitations of the technique.