Malignant Melanoma of Eyelid

Malignant melanoma of the eyelid is a rare but aggressive form of skin cancer that can spread to other parts of the body. Though it makes up less than 1% of all eyelid cancers, early detection and proper treatment are crucial to prevent serious complications.

Table of contents

• What is Malignant Melanoma of the Eyelid?
• How Does It Appear?
• Signs and Symptoms
• Who Is at Risk?
• How Is It Diagnosed?
• Treatment Options
• Outlook and Follow-up
• Prevention

What is Malignant Melanoma of the Eyelid?

Malignant melanoma of the eyelid is a type of skin cancer that develops in the pigment-producing cells, called melanocytes (cells that make the pigment melanin, which gives color to skin, hair and eyes), located in the eyelid skin.^[1] This is the same type of cancer that can occur on other parts of your skin, but when it affects the delicate tissue of the eyelid, it requires special attention and expertise.^[6]

Melanoma of the eyelid is relatively rare, making up less than 1% of all eyelid cancers.^[1] However, like other skin melanomas, it has the ability to spread to other parts of the body, which makes it potentially life-threatening.^[1] The same types of skin cancers that can appear anywhere on your body can also occur on the eyelid and surrounding areas, as these areas are just as vulnerable to harmful ultraviolet rays and other risk factors.^[5]

How Does It Appear?

Malignant melanoma of the eyelid typically appears as a pigmented thickening or tumor on the eyelid.^[1] Sometimes it may look like an extension of pigment from the conjunctiva (the clear tissue that covers the white part of the eye and lines the inside of the eyelids) onto the eyelid.^[1]

The tumor can appear as a pigmented lesion, growth, or mole on the eyelid that may change in size, shape, or color over time.^[6] One important characteristic is that it shows a documented history of growth, either noticed by the patient or captured in photographs over time.^[1]

While most eyelid melanomas are pigmented, some may have little or no color. These are called amelanotic melanomas, meaning “without melanin.”^[1] The lesion might be flat or raised (nodular), and it typically affects only one eye.^[1]

Signs and Symptoms

Malignant melanoma of the eyelid may look similar to a harmless eyelid mole (nevus), but there are warning signs that can help distinguish it.^[1] Key symptoms to watch for include:

• Variable pigmentation or changes in color^[1]
• Bleeding from the lesion^[1]
• Growth or increase in size^[1]
• Loss of eyelashes in the area of the lesion (called madarosis)^[3]
• Persistent redness surrounding the lesion^[3]

Any new growths, changes in existing moles, or areas of concern on your eyelids should be brought to the attention of a primary care doctor, dermatologist, or ophthalmologist as soon as possible.^[5] All pigmented eyelid tumors should be evaluated by an eye cancer specialist.^[1]

Who Is at Risk?

While malignant melanoma of the eyelid can occur in anyone, certain factors increase the risk of developing this cancer.

The most important risk factor is prolonged exposure to ultraviolet (UV) radiation from sunlight.^[5] People who have fair skin and light-colored eyes, particularly blue or green eyes, are at higher risk.^[5] Those with blonde hair, blue eyes, and a history of skin burns from sun exposure are considered to have high-risk characteristics.^[3]

Eyelid melanomas typically occur in middle-aged or older patients, especially in fair-skinned individuals.^[1] However, it’s important to note that melanomas can grow more rapidly in children and younger individuals, so suspicious lesions should never be dismissed simply because of age.^[1]

How Is It Diagnosed?

If your doctor suspects malignant melanoma of the eyelid, several steps are taken to confirm the diagnosis.

All eyelid tumors should be photographed so they can be compared with future examinations.^[1] When possible, patients should keep a copy of their baseline photographs.^[1]

If a doctor makes a clinical diagnosis of eyelid melanoma or notices that a lesion is changing, a biopsy (a procedure in which a small sample of tissue is removed for examination) should be performed.^[1] The biopsy must be an incisional biopsy, not a superficial one, because the depth of the tumor is an important risk factor for whether the cancer will spread to other parts of the body.^[1] A simple wedge biopsy can be sent to a laboratory for examination to help confirm the diagnosis.^[1]

Once the diagnosis is confirmed by laboratory analysis, a medical work-up is ordered to determine if the cancer has spread to other parts of the body. This process is called staging.^[1] Systemic staging typically involves total body imaging, from scalp to toes, using a PET/CT scan.^[1]

Treatment Options

Treatment for malignant melanoma of the eyelid depends on whether the cancer has spread to other parts of the body and the size and location of the tumor.

Surgery

If there is no evidence that the cancer has spread beyond the eyelid, the tumor can be surgically removed.^[1] The surgery involves removing the melanoma along with large margins of normal-appearing tissue around it to make sure all cancer cells are eliminated.^[1]

The extent of surgery depends on how much of the eyelid is affected.^[1] It can range from simple eyelid removal using techniques like wedge resection or Mohs surgery (a precise surgical technique that removes the cancer layer by layer) to more extensive procedures.^[1] In some cases, about one-third of the eyelid may need to be removed.^[3]

During the surgery, the patient receives local anesthesia to numb the eyelid, and the eye itself is protected with an eye shield.^[3] The removed tissue is sent to a laboratory to confirm that all the edges (margins) are clear of cancer cells.^[3]

At the time of surgery, some doctors may also remove lymph nodes near the tumor to determine if the cancer has spread locally.^[1]

Reconstruction

After the melanoma is removed, specialized plastic surgery techniques are used to repair the eyelid.^[1] These reconstructive procedures are performed by surgeons with expertise in oculoplastic surgery (a subspecialty that focuses on plastic and reconstructive surgery of the eye, eyelid, and surrounding structures).^[3]

The goal of reconstruction is to ensure that the eyeball is properly covered, that the eyelid can move up and down normally, and that there is no excessive tension or drooping.^[3] The surgeon may use nearby tissue to recreate a normal, functioning eyelid.^[3]

Radiation Therapy

In some cases, radiation therapy may be added to the treatment plan.^[1] This is typically done when it is not possible to remove the cancer completely with clear margins during surgery.^[1] Radiation can be delivered through external beam therapy or through a special implant called brachytherapy.^[1]

Recovery

After eyelid surgery, bruising and swelling are common and can last for two weeks or more.^[3] Patients typically use ice compresses for the first two days to reduce swelling and bruising, and they may take pain medication as needed.^[3] An antibiotic ointment is applied to the incision site twice daily to promote healing.^[3] Stitches are usually removed about two weeks after the procedure.^[3]

Outlook and Follow-up

The outlook for patients with malignant melanoma of the eyelid depends on several factors, including the size of the tumor, its location, and how early it is detected.^[5] Smaller melanomas typically have a better outlook and can often be treated effectively with surgery or radiation.^[5] Early-stage melanomas often have high success rates with treatment.^[5]

However, larger tumors may require more aggressive treatments and can sometimes lead to serious complications, including vision loss.^[5] Treatment options continue to improve, and the key to a favorable outcome is early detection and immediate treatment.^[5]

After primary treatment is complete, doctors follow up with patients regularly to monitor recovery and watch for any signs that the cancer has returned or that new lesions have formed.^[10]

Prevention

The most important way to prevent melanoma of the eyelid is to protect your eyes and the surrounding skin from sunlight.^[5] Sun protection is especially important between 10 a.m. and 4 p.m., when the sun’s rays are most intense.^[18]

Wearing sunglasses that block 99 to 100% of UVA and UVB rays is a simple yet effective way to protect your eyes from the harmful effects of UV radiation.^[5] Make it a habit to wear protective sunglasses whenever you’re outdoors, even on cloudy days, to safeguard your vision and maintain healthy eyes.^[5] A big hat can also provide additional protection.^[18]

Regular eye exams are also important for early detection.^[5] Be alert to changes in your vision or any visible changes on the eyelid or eyeball, such as a growing dark spot or a new lump or bump, and have them examined by a doctor promptly.^[5]