Craniopagus

Last revised by Francis Deng on 1 Sep 2020

Craniopagus twins are conjoined twins that are fused at any part of the skull, except the face, foramen magnum, skull base and the vertebral column.

The fused structures are most often the cranium, meninges, and dural venous sinuses. Brains tend to be separate; however, they may be connected by a bridge of neural tissue. The trunks and limbs are separate.

Exclusive extracranial tissues involvement needs no significant imaging evaluation; however, a CT is needed to study the osseous detail if vault fusion is present. MRI is required to study the degree of brain involvement and MR arteriogram and MR venogram are required to evaluate the status of the cerebral circulation and venous sinuses.

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