has part has part has_part characteristic of has modifier abnormal nasal septum cartilage morphology absent nasal septum cartilage 2017-09-26T13:46:35Z absent quadrangular cartilage absent nasal septal cartilage agenesis of the nasal septal cartilage MPheno.ontology MP:0030201 absence of the hyaline cartilage of the nasal septum that is somewhat quadrilateral in shape, thicker at its margins than at its center, and completes the separation between the nasal cavities abnormal absent cartilage of nasal septum