Fig. 3. Caput succedaneum and subgaleal hemorrhage.

Grayscale ultrasound images (a-c) of the scalp in a newborn male demonstrate a fluid collection that crosses midline, is deep to the subcutaneous fat/galeal aponeurosis and superficial to the periosteum/calvarium (noted as thick echogenic interface) consistent with a subgaleal hemorrhage. Axial CT (d) image in a 1-day-old male with history of traumatic delivery demonstrate scalp soft tissue overlying bilateral parietal regions and crossing the sagittal suture (arrows). Follow-up coronal MR image (e) demonstrates a deep subaponeurotic scalp fluid collection crossing the sagittal suture and extending anteriorly into the right temporal region, consistent with subgaleal hematoma (arrows). A more superficial overlying fluid collection with a similar distribution also noted (arrowheads). This collection is within the subcutaneous fibrofatty tissues superficial to galea aponeurosis and is consistent with caput succedaneum