Craniosynostosis affecting the lambdoid suture | Figure 1

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Craniosynostosis affecting the lambdoid suture

Frontal (image 1) and lateral (image 2) radiographs of the skull show premature fusion of the left lambdoid suture (arrow), confirmed on 3D reformatted CT (image 3). Craniosynostosis is the term for premature fusion of a cranial suture. The lambdoid suture is least commonly affected. When it occurs, patients have posterior plagiocephaly characterized by flattening and asymmetry of the occipital region. Differentiating lambdoid craniosynostosis from positional plagiocephaly can be challenging clinically.

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A 2-month old presents for a 3D head CT with the history of “abnormal head shape.” Clinically, and on imaging, the head is moderately dolichocephalic with the concern for craniosynostosis. Premature closure of which suture is associated with this finding? #FridayQuizDay](https://app.figure1.com/case-detail/069d7faf-f7f1-4474-bb06-067490bc2886)


AP and Townes view of the skull show imaging findings of craniosynostosis affecting the sagittal suture. There is sclerosis and bony bridging (arrow) of the sagittal suture. On the Townes view, there is bony ridging of the suture. Patients with craniosynostosis often present with an abnormal shape of the skull. The skull growth is arrested perpendicular to the affected suture. Thus, growth appears parallel to the affected suture. #FridayQuizDay #FridayQuiz](https://app.figure1.com/case-detail/195850d2-5852-4f02-9f4b-3ffe8b5ac57e)


Not the same baby as the previous case I posted. But, this is what surgery will do to ensure proper brain growth and development for a baby with sagittal suture #craniosynostosis. The early fusion was along the same suture as the previous baby. It's the most common type of synostosis. This baby was caught early and treated with surgery and a cranial remolding helmet.](https://app.figure1.com/case-detail/24702938-c64d-4542-8d4f-44bf4b684625)


Lateral (image 1) of the skull shows anterior posterior elongation, also termed dolichocephaly. The Townes view (image 2) shows bony ridging (arrow) at the sagittal suture. The remainder of the sagittal suture is not visible. Reformatted bone window CT (image 3) and 3D reformatted CT (image 4) show craniosynostosis (arrow) affecting the sagittal suture. Craniosynostosis is premature fusion of a cranial suture. Sagittal suture craniosynostosis is the most common accounting for up to 60% of patients. Patients may present with an abnormal shape of the skull and palpable bony ridging.](https://app.figure1.com/case-detail/4e977c98-3ec5-465d-a238-cfc8e0860c55)