USMLE® Step 1 style questions USMLE
A 1-week-old male infant who was born at term is brought to the clinic by his mother for consultation about lactation. During the physical examination, abnormal ridges can be felt at the sagittal suture during palpation of the baby's head. The length of the head is 5 cm longer and the width is 2 cm shorter than expected for his age. During the exam, he displays a normal flexed posture and expected strength, good activity and responsiveness. Which of the following is the most likely diagnosis?