abnormal mesoderm development abnormal lateral plate mesoderm morphology csmith MP:0010117 abnormal lateral plate mesenchyme abnormal lateral mesenchyme morphology abnormal LPM morphology any structural anomaly of the portion of the middle of the three primary germ layers of the embryo that resides on the periphery of the embryo, is continuous with the extra-embryonic mesoderm, splits into two layers enclosing the intra-embryonic coelom, and gives rise to body wall structures abnormal lateral mesoderm MPheno.ontology 2010-04-12T01:16:08Z