umls-concept:C0025990 | skos:definition | MSH: Unusual or undue smallness of the jaws. (Dorland, 27th ed),NCI: A congenital abnormality of the jaws (particularly the mandible) in which they are unusually small. This condition is not always pathological and may correct itself as the patient matures; however, it may also present as a birth defect in multiple syndromes. | lld:umls |