Retrognathia abnormal mandible morphology abnormal digestive organ placement retrognathia ectopic bone mandibular retrognathia 2017-10-11T13:24:03Z abnormal posterior-shifted positioning of the lower jaw (mandible) relative to the facial skeleton and soft tissues retrognathia of lower jaw MP:0030273 receding lower jaw mandibular retrognathism receding mandible mandibular retroposition MPheno.ontology mandibular retrognathia; retrognathia