Lisch nodule
Lisch Nodule
Lisch nodule (pronounced: lish noh-dyool) is a medical term referring to a specific type of hamartoma that is often associated with Neurofibromatosis Type 1 (NF1).
Etymology
The term "Lisch nodule" is named after Austrian ophthalmologist Karl Lisch, who first described these nodules in 1937. The word "nodule" comes from the Latin nodulus, meaning "small knot".
Definition
A Lisch nodule is a benign, pigmented hamartoma that appears on the iris of the eye. These nodules are typically harmless and do not affect vision. They are most commonly found in individuals with Neurofibromatosis Type 1, a genetic disorder that causes tumors to form on nerve tissue.
Related Terms
- Hamartoma: A benign, focal malformation that resembles a neoplasm in the tissue of its origin.
- Neurofibromatosis: A set of three conditions in which tumors grow in the nervous system.
- Iris (eye): The thin, circular structure in the eye, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina.
See Also
External links
- Medical encyclopedia article on Lisch nodule
- Wikipedia's article - Lisch nodule
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