choristoma


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choristoma

 [kor″is-to´mah]
a mass of histologically normal tissue in an abnormal location.

cho·ris·to·ma

(kō'ris-tō'mă),
A mass formed by maldevelopment of tissue of a type not normally found at that site.
[G. chōristos, separated, + -ōma]

choristoma

/cho·ris·to·ma/ (ko″ris-to´mah) a mass of histologically normal tissue in an abnormal location.

choristoma

Non-specialised tissue (chorista) that develops in utero and corresponds to normal cells and tissues located in abnormal sites (e.g., ectopic breast, liver or other tissues), which are called choristomas when they have a mass effect.

choristoma

Non-specialized tissue that develops in utero, which corresponds to normal cells and tissues located in abnormal sites–eg, ectopic breast, liver, or other tissues. See Neuromuscular choristoma.

cho·ris·to·ma

(kōr'is-tō'mă)
A mass formed by maldevelopment of tissue of a type not normally found at that site.
[G. chōristos, separated, + -ōma]

choristoma

a mass of histologically normal tissue in an abnormal location.
References in periodicals archive ?
A case of epibulbar osseous choristoma with review of literature.
Histologically, osseous choristomas consist of mature lamellar bone and are covered by epithelium.
6) Our review of the English-language world literature on MEDLINE found only 32 cases of choristoma of the middle ear.
After correlating the radiologic and operative findings and obtaining surgical confirmation of the absence of a cranial connection, we diagnosed the lesion as a middle ear glial choristoma.
DISCUSSION: Choristoma in tonsil could be a developmental abnormality of second pharyngeal arch.
Neuromuscular choristoma (NMC) is an uncommon tumor that usually involves a large nerve trunk.
INTRODUCTION: Choristoma refers to presence of normal tissue found in an abnormal location.
This lesion has been given several names, including cystic choristoma, heterotopic gastrointestinal cyst, enterocystoma, and duplication cyst.
However, the histogenesis of these tumors is controversial, evident by various terms in the literature that have attempted to describe GCT, including choristoma, tumorlet, myoblastoma, and pituicytoma.
1] Four categories of ocular choristomas described are dermoid, dermolipoma, complex choristoma and single tissue choristoma.
Inclusion of a number of newer entities, such as inflammatory pseudo-tumor of the peripheral nerves, palisaded encapsulated neuroma, neuromuscular choristoma, and Pacinian neuromas adds to the completeness of the peripheral nerve lesions that may present as "tumors.
The differential diagnoses of such a mass include nasal glial heterotopia (nasal glioma), nasal dermoid cyst, encephalocele, hamartoma, choristoma, hairy polyp, and fetal rhabdomyoma.