Choristoma Explained

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

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,^[5] gastric tissue located in distal ileum in Meckel diverticulum).

Notes and References

1. Book: Lee. Kenneth H.. Roland. Peter S.. Encyclopedia of Otolaryngology, Head and Neck Surgery . Heterotopias, Teratoma, and Choristoma . 2013. 1179–1183. 10.1007/978-3-642-23499-6_642. 978-3-642-23498-9.
2. Jorquera. JessicaPatricia Correa. Rubio-Palau. Josep. Cazalla. AsteriaAlbert. Rodríguez-Carunchio. Leonardo. Choristoma: A rare congenital tumor of the tongue. Annals of Maxillofacial Surgery. 2016. 6. 2. 311–313. 10.4103/2231-0746.200342. 5343649. 28299279 . free .
3. Goswamy. Monika. Tabasum. Syeda. Kudva. Praveen. Gupta. Shikha. Osseous choristoma of the periodontium. Journal of Indian Society of Periodontology. 2012. 16. 1. 120–2. 10.4103/0972-124X.94619. 3357020. 22628977 . free .
4. 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. en. 307. 1. C25–C38. 10.1152/ajpcell.00084.2014. 0363-6143. 4080181. 24788248.
5. Adhikari. Bhoj Raj. Osseous choristoma of the tongue: two case reports. Journal of Medical Case Reports. 2016. 59. 4794853. 2016. 26983573. 10.1186/s13256-016-0840-8 . free .