Hypoglossia/aglossia

Hypoglossia and aglossia are rare congenital anomalies characterized by an underdeveloped (hypoglossia) or completely absent (aglossia) tongue. These conditions are present at birth and result from a developmental defect during embryogenesis affecting the formation of the tongue. The tongue plays critical roles in feeding, swallowing, speech articulation, and oral hygiene, so individuals with these conditions face significant functional challenges from the neonatal period onward. Key clinical features include difficulty with breastfeeding and bottle-feeding in infancy due to impaired sucking and swallowing mechanics. As children grow, speech articulation is notably affected, though many individuals develop remarkable compensatory mechanisms using the lips, palate, mandible, and remaining oral structures to produce intelligible speech. Dental and orthodontic problems may also occur, as the tongue normally plays a role in guiding tooth eruption and maintaining dental arch form. Hypoglossia/aglossia may occur as an isolated malformation or as part of a broader syndrome, such as oromandibular-limb hypogenesis syndrome (also known as Hanhart syndrome or hypoglossia-hypodactylia syndrome), where limb anomalies including hypodactyly or adactyly may co-occur. There is no cure for hypoglossia or aglossia, and management is supportive and multidisciplinary. Treatment typically involves speech-language therapy to maximize communication abilities, specialized feeding strategies and nutritional support in infancy, and dental or orthodontic care. In some cases, prosthetic tongue devices (palatal augmentation prostheses) may be used to assist with speech and swallowing. Surgical interventions are rarely performed but may be considered in specific circumstances. A team approach involving pediatricians, speech-language pathologists, dentists, oral surgeons, and geneticists is essential for optimal outcomes.

Inheritance

Variable

Can be inherited in different ways depending on the underlying gene

Age of Onset

Neonatal

Begins at or shortly after birth (first 4 weeks)

Source: openFDA + DailyMed · NDA / BLA labels with structured indications · refreshed weekly

Source: ClinicalTrials.gov · synced daily · phases, status, and PI names normalized at ingest

Source: NPI Registry + PubMed · trial PI roles cross-referenced with ClinicalTrials.gov · ranked by match score (publications + PI activity + community signal)

Source: NORD Rare Disease Centers + NIH Undiagnosed Diseases Network (UDN) · centers verified active within last 12 months

Source: PubMed + NIH RePORTER + openFDA + clinical-journal RSS · last 30 days · disease-tagged at ingest by AI extraction with human QC

Common questions about Hypoglossia/aglossia