choristoma
A choristoma is simply a collection of microscopically normal cells or tissues in an abnormal location. This is different to a hamartoma which is derived only from local tissues.
Examples include:
- adrenal choristoma (myelolipoma)
- nasopharyngeal choristoma
- facial nerve choristoma
- optic nerve choristoma
- trigeminal nerve choristoma
- ocular choristoma
- pituitary choristoma
- Mullerianosis