abnormal trigeminal nerve morphology abnormal maxillary nerve morphology MP:0009799 MPheno.ontology abnormal CN V2 abnormal V2 nerve morphology any structural anomaly of the sensory nerve subdivision of the trigeminal nerve that transmits sensory information from the palate, upper teeth and gingiva, the skin between the palpebral fissure and the mouth, and from the nasal cavity and maxillary sinuses