notochordal process

no·to·chor·dal pro·cess

in the embryo, a midline column of cells that are rostral to the primitive node and form the notochord.
See also: head process.
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The cleft created by ultimate separation of the prechordal plate and notochordal process is theorized to lead to a potentially sizeable skull base defect as noted in this patient [15].
Endoscopic Resection of Skull Base Teratoma in Klippel-Feil Syndrome through Use of Combined Ultrasonic and Bipolar Diathermy Platforms

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