Lingual tonsils
| Lingual tonsils | |
|---|---|
 Tongue | |
| Details | |
| System | Immune system (lymphatic system) |
| Identifiers | |
| Latin | tonsilla lingualis |
| TA98 | A05.1.04.022 |
| TA2 | 2830 |
| FMA | 54836 |
| Anatomical terminology | |
The lingual tonsils are a collection of lymphatic tissue located in the lamina propria of the root of the tongue.[1] This lymphatic tissue consists of the lymphatic nodules rich in cells of the immune system (immunocytes).[2] The immunocytes initiate the immune response when the lingual tonsils get in contact with invading microorganisms (pathogenic bacteria, viruses or parasites).[2][3][4]
Structure
[edit]Microanatomy
[edit]Lingual tonsils are covered externally by stratified squamous epithelium (nonkeratinized) that invaginates inward forming tonsillar crypts. Beneath the epithelium is a layer of lymphoid nodules containing lymphocytes. Mucous glands located at the root of the tongue are drained through several ducts into the crypts of the lingual tonsils.[2][3] Secretions of these mucous glands keep the crypts clean and free of any debris.
Blood supply
[edit]Lingual tonsils are located on posterior aspect of tongue which is supplied through:[1]
- Lingual artery, branch of external carotid artery
- Tonsillar artery
- Ascending and descending palatine arteries
- Ascending pharyngeal branch of external carotid artery
Nerve supply
[edit]Lingual tonsils are innervated by tonsillar nerves from the tonsilar plexus, formed by the glossopharyngeal and vagus nerves.[1]
Function
[edit]
Like other lymphatic tissues, the function of lingual tonsils is to prevent infections. These tonsils contain B and T lymphocytes which get activated when harmful bacteria and viruses come in contact with tonsils. B lymphocytes kill pathogens by producing antibodies against them, while T lymphocytes directly kill them releasing cytotoxic substances or indirectly by stimulating other cells of the immune system.[2][3][4]
Clinical significance
[edit]Cancer
[edit]Squamous cell carcinoma is a type of neoplasm that can affect lingual tonsils.[5]
Sleep apnea
[edit]Enlarged or hypertrophic lingual tonsils have the potential to cause or exacerbate sleep apnea.[6]
Additional images
[edit]-
Lingual tonsil -
Lingual tonsil -
Lingual tonsils
References
[edit]
This article incorporates text in the public domain from page 1138 of the 20th edition of Gray's Anatomy (1918)
- ^ a b c Moore, Keith L. (2013-02-13). Clinically oriented anatomy. Dalley, Arthur F., II,, Agur, A. M. R. (Seventh ed.). Philadelphia. ISBN 978-1451119459. OCLC 813301028.
{{cite book}}: CS1 maint: location missing publisher (link) - ^ a b c d Mescher, Anthony L. (22 February 2013). Junqueira's basic histology : text and atlas. Junqueira, Luiz Carlos Uchôa, 1920- (Thirteenth ed.). New York. ISBN 9780071807203. OCLC 854567882.
{{cite book}}: CS1 maint: location missing publisher (link) - ^ a b c Ross, Michael H. (2011). Histology : a text and atlas : with correlated cell and molecular biology. Pawlina, Wojciech. (6th ed.). Philadelphia: Wolters Kluwer/Lippincott Williams & Wilkins Health. ISBN 9780781772006. OCLC 548651322.
- ^ a b Abbas, Abul K. (2012). Cellular and molecular immunology. Lichtman, Andrew H., Pillai, Shiv. (7th ed.). Philadelphia: Elsevier/Saunders. ISBN 9781437715286. OCLC 698580696.
- ^ Theodoraki, M-N.; Veit, J. A.; Hoffmann, T. K.; Greve, J. (2017-06-26). "Synchronous bilateral tonsil carcinoma: case presentation and review of the literature". Infectious Agents and Cancer. 12: 38. doi:10.1186/s13027-017-0146-5. ISSN 1750-9378. PMC 5485684. PMID 28670333.
- ^ Badełek-izdebska, Małgorzata; Dębska, Małgorzata; Zawadzka-Głos, Lidia (2015-12-23). "Lingual Tonsil Hypertrophy as a Cause of Obstructive Sleep Apnea Syndrome – Case Report". New Medicine. 19 (4): 130–132. doi:10.5604/14270994.1191789. ISSN 1427-0994.
External links
[edit]- Pictures at usc.edu(Registration required)
- Anatomy Atlases – Microscopic Anatomy, plate 09.163
- Histology image: 09802loa – Histology Learning System at Boston University
- MedEd at Loyola histo/HistoImages/hl6-27.jpg (labeled as 'lymphoid tissue')]
- Lingual Tonsil
