abnormal craniofacial development abnormal maxillary prominence morphology 2011-03-15T02:31:27Z MP:0010940 MPheno.ontology abnormal embryonic maxillary process morphology any structural anomaly of the paired dorsal prominences formed by bifurcation of the first pharyngeal arches in the embryo that unite with the ipsilateral medial nasal process to form the upper jaw mgi