Choristoma

Choristomas, a form of heterotopia, are masses of normal tissues found in abnormal locations.[1][2][3][4] In contrast to a neoplasm or tumor, the growth of a choristoma is normally regulated.[5]

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,[6] 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.
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