Most common intraocular tumour in adult:
**Core Concept**
The question is testing knowledge of the most common intraocular tumour in adults, which is a specific type of neoplasm that arises from the cells within the eye. Intraocular tumours can be benign or malignant, and their diagnosis and management require a thorough understanding of ophthalmology.
**Why the Correct Answer is Right**
The most common intraocular tumour in adults is the **Uveal Melanoma**. This type of tumour originates from the pigment-producing cells (melanocytes) of the uvea, which is the middle layer of the eye consisting of the choroid, ciliary body, and iris. Uveal melanoma typically arises from the choroid, which is the most vascularized layer of the eye. The exact cause of uveal melanoma is unknown, but it is thought to be related to genetic mutations and UV radiation exposure. Uveal melanoma can be diagnosed with imaging techniques such as ultrasound biomicroscopy and fine-needle aspiration biopsy.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is not a specific type of intraocular tumour.
**Option B:** This option is incorrect because it is not the most common intraocular tumour in adults.
**Option C:** This option is incorrect because it is a type of tumour that typically affects children and young adults.
**Clinical Pearl / High-Yield Fact**
Uveal melanoma is a type of cancer that can metastasize to other parts of the body, including the liver and lungs. Early detection and treatment of uveal melanoma are crucial to prevent metastasis and improve patient outcomes.
**Correct Answer:** C.