title: Macroglossia.
mesh_terms: D002648:Child; D004314:Down Syndrome / Q000150:complications* / Q000378:metabolism; D005927:Glossectomy; D006801:Humans; D012701:Serotonin / Q000378:metabolism; D014059:Tongue / Q000002:abnormalities*
chemical_list: D012701:Serotonin