Macroglossia

Macroglossia (Orphanet code 156207; ICD-10 Q38.2) refers to an abnormal enlargement of the tongue that extends beyond the teeth or alveolar ridge at rest. It can be congenital or acquired and may occur as an isolated finding or as a feature of numerous underlying conditions. When congenital, macroglossia is frequently associated with syndromes such as Beckwith-Wiedemann syndrome, Down syndrome, mucopolysaccharidoses, and congenital hypothyroidism. Acquired causes include amyloidosis, acromegaly, myxedema, and certain vascular or lymphatic malformations of the tongue. Macroglossia primarily affects the orofacial system but can have secondary effects on the respiratory, digestive, and musculoskeletal systems. Key clinical features include difficulty with feeding and swallowing (dysphagia), speech difficulties (dysarthria), drooling, airway obstruction (which may cause obstructive sleep apnea), open-mouth posture, dental malocclusion, and mandibular prognathism due to chronic tongue protrusion. In severe cases, the enlarged tongue may compromise the airway, particularly in neonates and infants, requiring urgent intervention. Treatment depends on the severity of the macroglossia and its underlying cause. Mild cases may be managed conservatively with speech therapy, orthodontic treatment, and monitoring. When macroglossia causes significant functional impairment — such as airway obstruction, feeding difficulties, or speech problems — surgical tongue reduction (glossectomy or partial glossectomy) may be indicated. Addressing the underlying condition, when identifiable, is also an essential component of management. Multidisciplinary care involving geneticists, otolaryngologists, oral and maxillofacial surgeons, speech-language pathologists, and orthodontists is often recommended for optimal outcomes.

Common questions about Macroglossia