Uniprot Description A very rare skeletal disorder with facial anomalies, hypotonia and neurologic dysfunction due to meningocele, a protrusion of the meninges, unaccompanied by neural tissue, through a bony defect in the skull or vertebral column. LMNS facial features include hypertelorism and telecanthus, high arched eyebrows, ptosis, mid-facial hypoplasia, micrognathia, high and narrow palate, low-set ears and a hypotonic appearance. Additional variable features are connective tissue abnormalities, aortic dilation, a high-pitched nasal voice, wormian bones and osteolysis.