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The majority of the falx appears deficient, particularly anteriorly and the anterior cerebral artery is azygous. The pituitary, optic chiasm and hypothalamus appear normal.
Features in keeping with the middle interhemispheric variant of holoprosencephaly, also known as syntelencephaly.
Case Discussion
This case demonstrates features of syntelencephaly, a rare malformation along the holoprosencephaly spectrum.