has part has part has_part characteristic of part of has modifier abnormal posterior cranial fossa morphology abnormal cranial foramen morphology abnormal jugular foramen morphology 2017-12-05T12:47:37Z MP:0030470 any structural anomaly of the large irregular opening from the posterior cranial fossa that is bounded anteriorly by the petrous part of the temporal bone and posteriorly by the jugular notch of the occipital bone; it transmits the inferior petrosal sinus, the glossopharyngeal, vagus, and accessory nerves, and the internal jugular vein MPheno.ontology abnormal posterior lacerate foramen morphology morphology abnormal jugular foramen