Not to be confused with Retrognathism.
Classification and external resources
Specialty gastroenterology
ICD-10 K07.0
ICD-9-CM 524.04
DiseasesDB 22641
MedlinePlus 003306
MeSH D008844

Micrognathism, also called micrognathia, strawberry chin, hypognathia[1] or hypogthathism, is a condition where the jaw is undersized. It is also sometimes called "Mandibular hypoplasia". It is common in infants, but is usually self-corrected during growth, due to the jaws' increasing in size. It may be a cause of abnormal tooth alignment and in severe cases can hamper feeding.[2] It can also, both in adults and children, make intubation difficult, either during anesthesia or in emergency situations.


While not always pathological, it can present as a birth defect in multiple syndromes including:


It can be detected by the naked eye as well as dental or skull X-Ray testing.

See also


  1. Martínez-Frías, ML; Martín, M; Pardo, M; Torres, M; Cohen MM, Jr (1993). "Holoprosencephaly and hypognathia with two proboscides: report of a case and review of unusual proboscides.". Journal of craniofacial genetics and developmental biology. 14 (4): 231–4. PMID 7883869.
  2. Hong, Paul; Brake, Maria K.; Cavanagh, Jonathan P.; Bezuhly, Michael; Magit, Anthony E. (2012). "Feeding and mandibular distraction osteogenesis in children with Pierre Robin sequence: A case series of functional outcomes". International Journal of Pediatric Otorhinolaryngology. 76 (3): 414–418. doi:10.1016/j.ijporl.2011.12.023. ISSN 0165-5876.
  3. Rajendran A; Sundaram S (10 February 2014). Shafer's Textbook of Oral Pathology (7th ed.). Elsevier Health Sciences APAC. pp. 12–13. ISBN 978-81-312-3800-4.
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