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 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 arteriorgram and MR venogram are required to evaluate the status of the cerbral circulation and venous sinuses.
- 1. Kingston CA, McHugh K, Kumaradevan J et-al. Imaging in the preoperative assessment of conjoined twins. Radiographics. 2001;21 (5): 1187-208. doi:10.1148/radiographics.21.5.g01se011187 - Pubmed citation
- 2. Winkler N, Kennedy A, Byrne J et-al. The imaging spectrum of conjoined twins. Ultrasound Q. 2008;24 (4): 249-55. doi:10.1097/RUQ.0b013e31818c8858 - Pubmed citation