Satellite lesions in eye is caused by –
**Core Concept**
Satellite lesions in the eye refer to smaller, peripheral lesions that are associated with a central, primary lesion. This phenomenon is often seen in certain ocular conditions, particularly those involving inflammation or infectious processes.
**Why the Correct Answer is Right**
Satellite lesions are commonly seen in uveitis, specifically in the context of posterior uveitis. This type of uveitis is characterized by inflammation of the posterior segment of the eye, including the retina and choroid. The inflammation can lead to the formation of smaller, peripheral lesions, or satellite lesions, which are thought to be a result of the spread of inflammatory cells from the primary lesion. The presence of satellite lesions can help differentiate posterior uveitis from other types of uveitis.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because satellite lesions are not typically associated with anterior uveitis, which primarily involves inflammation of the anterior segment of the eye.
**Option B:** Incorrect because choroidal melanoma is a type of primary intraocular malignancy, but it is not typically characterized by satellite lesions.
**Option C:** Incorrect because retinal detachment is a condition that involves the separation of the retina from the underlying retinal pigment epithelium, but it is not typically associated with satellite lesions.
**Clinical Pearl / High-Yield Fact**
When evaluating patients with posterior uveitis, it's essential to look for satellite lesions, as they can be a key feature of this condition. Additionally, the presence of satellite lesions can help guide treatment decisions, including the use of immunosuppressive therapy.
**Correct Answer: C. Retinal or choroidal vasculitis**