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Choristomas, a form of heterotopia, are masses of normal tissues found in abnormal locations. In contrast to a neoplasm or tumor, the growth of a choristoma is normally regulated.

It is different from a hamartoma. The two can be differentiated as follows: a hamartoma is disorganized overgrowth of tissues in their normal location (e.g., Peutz–Jeghers polyps), while a choristoma is normal tissue growth in an abnormal location (e.g., osseous choristoma, gastric tissue located in distal ileum in Meckel diverticulum).

References

1. "Choristoma" at Dorland's Medical Dictionary
2. Lee, Kenneth H.; Roland, Peter S. (2013). "Heterotopias, Teratoma, and Choristoma". Encyclopedia of Otolaryngology, Head and Neck Surgery. pp. 1179–1183. doi:10.1007/978-3-642-23499-6_642. ISBN 978-3-642-23498-9.
3. Jorquera, JessicaPatricia Correa; Rubio-Palau, Josep; Cazalla, AsteriaAlbert; Rodríguez-Carunchio, Leonardo (2016). "Choristoma: A rare congenital tumor of the tongue". Annals of Maxillofacial Surgery. 6 (2): 311–313. doi:10.4103/2231-0746.200342. PMC 5343649. PMID 28299279.
4. Goswamy, Monika; Tabasum, Syeda; Kudva, Praveen; Gupta, Shikha (2012). "Osseous choristoma of the periodontium". Journal of Indian Society of Periodontology. 16 (1): 120–2. doi:10.4103/0972-124X.94619. PMC 3357020. PMID 22628977.
5. Birbrair, Alexander; Zhang, Tan; Wang, Zhong-Min; Messi, Maria Laura; Olson, John D.; Mintz, Akiva; Delbono, Osvaldo (2014-07-01). "Type-2 pericytes participate in normal and tumoral angiogenesis". American Journal of Physiology. Cell Physiology. 307 (1): C25 – C38. doi:10.1152/ajpcell.00084.2014. ISSN 0363-6143. PMC 4080181. PMID 24788248.
6. Adhikari, Bhoj Raj (2016). "Osseous choristoma of the tongue: two case reports". Journal of Medical Case Reports. 2016: 59. doi:10.1186/s13256-016-0840-8. PMC 4794853. PMID 26983573.

External links

• Choristoma at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

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