23/05/2023
Choroidal melanoma, also known as uveal melanoma, is a type of cancer that develops in the choroid, which is the layer of blood vessels in the eye located between the retina and the sclera. The choroid contains melanocytes, the pigment-producing cells responsible for eye color.
Here are some key points about choroidal melanoma:
Causes:
The exact cause of choroidal melanoma is not fully understood. However, several factors may contribute to its development, including genetic mutations, exposure to ultraviolet (UV) radiation, and certain inherited conditions like dysplastic nevus syndrome or ocular melanocytosis.
Symptoms:
In the early stages, choroidal melanoma may not cause any noticeable symptoms. As the tumor grows, common signs and symptoms may include blurred vision, decreased visual acuity, distorted vision, floaters (spots or cobweb-like shapes in the vision), a visible dark spot on the iris, or in some cases, eye pain.
Diagnosis:
Diagnosing choroidal melanoma typically involves a comprehensive eye examination, which may include dilating the pupil to examine the back of the eye. Additional tests may be performed, such as ultrasound imaging, fluorescein angiography (to study blood vessels in the eye), optical coherence tomography (OCT), and, in some cases, a biopsy of the tumor.
Treatment:
Treatment options for choroidal melanoma depend on various factors, including the size and location of the tumor, as well as the individual's overall health. Treatment may involve radiation therapy (brachytherapy or proton beam therapy), surgical removal of the tumor (partial or complete), or a combination of therapies.
Prognosis:
The prognosis for choroidal melanoma depends on several factors, including the size and location of the tumor, the presence of metastasis (spread to other parts of the body), and individual factors such as age and overall health. If the tumor is small and has not spread beyond the eye, the prognosis is generally better. However, choroidal melanoma has the potential to metastasize, primarily to the liver.