Sebaceous Carcinoma: Complete Guide to Symptoms, Causes, Diagnosis, and Treatment
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: September 2026
TL;DR
Sebaceous carcinoma is a rare cancer that begins in an oil gland in the skin, and it most often affects the eyelids. On the eyelid, it usually starts as a small, painless lump that may look pink, red-brown, or yellow, with thickening skin and swelling. It can grow quickly and sometimes spreads to other parts of the body. Treatment often involves surgery, including Mohs surgery for the eyelid and face, or radiation therapy. There is no way to prevent it, and people over 60 face the highest risk.
Quick Answer: What Is Sebaceous Carcinoma?
Sebaceous carcinoma is a rare type of cancer that begins in an oil gland in the skin, called a sebaceous gland. It most often affects the eyelids, where it may appear as a painless lump or skin thickening. The cause often isn't known, and the cancer can grow quickly and sometimes spreads to other parts of the body. Treatment often involves surgery to remove the cancer.
What Is Sebaceous Carcinoma?
Sebaceous carcinoma is a rare type of cancer that begins in an oil gland in the skin. Sebaceous carcinoma most often affects the eyelids.
Sebaceous carcinoma may begin as a painless lump or thickening of skin on the eyelid. On other parts of the body, it might cause a bump on the skin that may bleed or have a scab. Sebaceous carcinoma treatment often involves surgery to remove the cancer. Sebaceous carcinoma can grow quickly and sometimes spreads to other parts of the body.
Key Fact | Detail |
|---|---|
Type of cancer | Rare; begins in an oil gland (sebaceous gland) in the skin |
Most common location | The eyelids |
Typical first sign | Painless lump or skin thickening on the eyelid |
Elsewhere on the body | A bump that may bleed or have a scab |
Growth behavior | Can grow quickly; sometimes spreads to other parts of the body |
Typical treatment | Surgery to remove the cancer |
Prevention | There is no way to prevent sebaceous carcinoma |
Sebaceous Glands: The Starting Point
Sebaceous glands are the oil-producing glands of the skin. Sebaceous carcinoma starts as a growth of cells in these glands. Understanding the glands helps explain where this cancer starts and why it appears where it does.
Skin Structure | Role |
|---|---|
Sebaceous gland | Oil-producing gland of the skin; where this cancer starts |
Oil production | Healthy glands release oil onto the skin |
Where glands cluster | Around hair follicles, including the eyelid area |
Sebaceous Carcinoma Symptoms
Symptoms of sebaceous carcinoma may vary based on where it starts. This cancer happens most often on the eyelid.
Symptoms of sebaceous carcinoma on the eyelid include a small, painless lump on the upper eyelid, a lump that may look pink, red-brown, or yellow, eyelid skin that becomes thicker, and swelling and irritation on the eyelid.
When sebaceous carcinoma happens on other parts of the body, it's called extraocular sebaceous carcinoma. Its symptoms include a lump on the skin, a lump that may look yellow, tan, dark brown, or copper-colored depending on your skin color, and a lump that forms on the head, neck, trunk, arm, or leg.
Location | Symptoms |
|---|---|
Eyelid (most common) | Small, painless lump on the upper eyelid; lump may look pink, red-brown, or yellow; thicker eyelid skin; swelling and irritation on the eyelid |
Other body parts (extraocular) | Lump on the skin that may bleed or form a scab; color may be yellow, tan, dark brown, or copper depending on skin color; appears on the head, neck, trunk, arm, or leg |
When to See a Doctor
Make an appointment with a doctor or other healthcare professional if you have any symptoms that worry you. Because this cancer can grow quickly and sometimes spreads, an early evaluation of any persistent lump — especially on the eyelid — matters.
What Causes Sebaceous Carcinoma?
The cause of sebaceous carcinoma often isn't known. This cancer starts as a growth of cells in the oil-producing glands of the skin. These glands are called sebaceous glands.
Sebaceous carcinoma happens when sebaceous gland cells get changes in their DNA. A cell's DNA holds the instructions that tell the cell what to do. In healthy cells, the DNA gives instructions to grow and multiply at a set rate, and it tells the cells to die at a set time. In cancer cells, the DNA changes give different instructions: the changes tell the cancer cells to grow and multiply quickly, and cancer cells can keep living when healthy cells would die. This causes too many cells, and the cancer cells form a growth or lump on the skin.
Risk Factors
Risk factors for sebaceous carcinoma include a weakened immune system, radiation therapy, older age, and hereditary syndromes.
A weakened immune system raises risk. If the body's germ-fighting immune system is weakened by medicine or illness, there might be a higher risk of sebaceous carcinoma. This includes people taking medicine to control the immune system, such as after an organ transplant. Some health conditions, such as HIV infection, also can weaken the immune system.
People who received radiation therapy treatments for cancer may have a higher risk of sebaceous carcinoma. The cancer happens most often in people over age 60. Finally, people with some conditions that run in families may be more likely to have sebaceous carcinoma, including Lynch syndrome and Muir-Torre syndrome.
There is no way to prevent sebaceous carcinoma.
Risk Factor | Why It Raises Risk |
|---|---|
Weakened immune system | From medicine (e.g., after an organ transplant) or illness (e.g., HIV infection) |
Radiation therapy | Prior radiation treatment for cancer raises risk |
Older age | Most often occurs in people over age 60 |
Hereditary syndromes | Lynch syndrome and Muir-Torre syndrome run in families |
How Is Sebaceous Carcinoma Diagnosed?
Tests and procedures used to diagnose sebaceous carcinoma include a skin exam, an eye exam, and a skin biopsy.
A healthcare professional may carefully inspect your skin to understand your condition. If you have sebaceous carcinoma on your eyelid, you might need to see an eye doctor. Eye doctors are also called ophthalmologists. The eye doctor will carefully check your eyelid and your eye, looking for signs that cancer has spread to the tissue that covers the inside of your eyelid and the white of your eye.
Your healthcare professional may remove a small amount of tissue for testing in a skin biopsy. Specialized lab tests can determine if cancer cells are present.
Diagnostic Step | What It Shows |
|---|---|
Skin exam | Careful inspection of the skin to understand the condition |
Eye exam (ophthalmologist) | Checks the eyelid and eye; looks for signs of spread to the tissue covering the inside of the eyelid and the white of the eye |
Skin biopsy | A small amount of tissue removed for testing; specialized lab tests determine if cancer cells are present |
Treatment Options
Sebaceous carcinoma treatment often involves surgery to remove the cancer. Other treatments might be options in certain situations.
Surgery to remove the cancer. Your healthcare professional may recommend a procedure to remove the cancer and some of the healthy tissue that surrounds it. A specialist will examine the edges of the tissue to make sure no cancer cells are present. This makes it more likely that all of the cancer cells are removed during surgery.
Mohs surgery. Mohs surgery is a specialized type of surgery that involves removing thin layers of cancer-containing skin until only cancer-free tissue is left. After each layer of skin is removed, it's checked for signs of cancer. The process keeps going until there are no signs of cancer. This technique may be helpful if your cancer is in a spot where surgeons want to preserve as much of the healthy skin as possible — examples include the eyelid and the face.
Radiation therapy. Radiation therapy uses powerful energy beams, such as X-rays and protons, to kill cancer cells. It can be used after surgery to kill any cancer cells that might remain. Radiation therapy may be used alone if surgery isn't an option.
Clinical trials. Clinical trials to test new treatments may be an option. Ask your healthcare professional whether you're eligible to participate in a clinical trial.
Treatment | How It Works | Best For |
|---|---|---|
Surgery | Removes the cancer plus some surrounding healthy tissue; edges examined to confirm no cancer cells remain | Standard treatment for most cases |
Mohs surgery | Removes thin layers, checking each one for cancer until only cancer-free tissue remains | Spots where healthy skin should be preserved, such as the eyelid and face |
Radiation therapy | X-ray or proton beams kill cancer cells | After surgery to remove remaining cells, or alone if surgery isn't an option |
Clinical trials | Testing of new treatments | Ask your healthcare professional about eligibility |
Preparing for Your Appointment
Make an appointment with a doctor or other healthcare professional if you have any symptoms that worry you. If your health professional thinks that you might have sebaceous carcinoma, that person may refer you to a specialist. Often this is a doctor who specializes in treating skin conditions, called a dermatologist.
Appointments can be short, and being prepared can help. When you make the appointment, ask if there's anything you need to do in advance, such as fasting before having a specific test. Make a list of your symptoms, including any that don't seem related to the reason for your appointment. Include key personal information, such as major stresses, recent life changes, and family medical history. List all medications, vitamins, or other supplements you take, including the doses. Take a family member or friend along, if possible, to help you remember the information you're given.
Questions to Ask Your Doctor | What the Doctor Will Likely Ask |
|---|---|
Do I have cancer? | When did your symptoms begin? |
Do I need more tests? | Have your symptoms been continuous or occasional? |
What are my treatment options? | How bad are your symptoms? |
What are the potential risks of these treatment options? | What, if anything, seems to improve your symptoms? |
Do any of the treatments cure my cancer? | What, if anything, appears to worsen your symptoms? |
Can I have a copy of my pathology report? | — |
How much time can I take to consider my treatment options? | — |
Are there brochures or other printed material, and what websites do you recommend? | — |
What would happen if I chose not to have treatment? | — |
Conclusion
Sebaceous carcinoma is a rare cancer that begins in the oil glands of the skin, most often appearing on the eyelid as a small, painless lump that may look pink, red-brown, or yellow. Because it can grow quickly and sometimes spreads to other parts of the body, an early evaluation of any persistent eyelid lump or unusual skin growth is important. Diagnosis relies on a skin exam, an eye exam when the eyelid is involved, and a skin biopsy, and treatment most often involves surgery — with Mohs surgery protecting healthy skin on the eyelid and face, and radiation therapy serving as a follow-up or standalone option. There is no way to prevent this cancer, but knowing the risk factors and symptoms puts you in the best position to act early.
Take the next step: If you have any lump or skin symptom that worries you, make an appointment with a healthcare professional.
Frequently Asked Questions
What is sebaceous carcinoma?
Sebaceous carcinoma is a rare type of cancer that begins in an oil gland in the skin, called a sebaceous gland. It most often affects the eyelids.
What does sebaceous carcinoma look like on the eyelid?
It may begin as a small, painless lump on the upper eyelid. The lump may look pink, red-brown, or yellow, and the eyelid skin can become thicker with swelling and irritation.
Where does sebaceous carcinoma occur besides the eyelid?
When it occurs on other parts of the body, it's called extraocular sebaceous carcinoma. It causes a lump on the skin that may bleed or have a scab, appearing yellow, tan, dark brown, or copper-colored depending on your skin color, typically on the head, neck, trunk, arm, or leg.
Is sebaceous carcinoma dangerous?
Sebaceous carcinoma can grow quickly and sometimes spreads to other parts of the body, so early diagnosis and treatment are important.
What causes sebaceous carcinoma?
The cause often isn't known. It starts when sebaceous gland cells develop changes in their DNA, which tell the cells to grow and multiply quickly and to keep living when healthy cells would die, forming a growth or lump.
Who is most at risk for sebaceous carcinoma?
It happens most often in people over age 60. Risk is higher with a weakened immune system (from transplant medicines or illnesses such as HIV), prior radiation therapy for cancer, and hereditary syndromes such as Lynch syndrome and Muir-Torre syndrome.
Can sebaceous carcinoma be prevented?
There is no way to prevent sebaceous carcinoma.
How is sebaceous carcinoma treated?
Treatment often involves surgery to remove the cancer along with some surrounding healthy tissue, with the edges checked for cancer cells. Mohs surgery may be used on the eyelid and face to preserve healthy skin. Radiation therapy can be used after surgery or alone if surgery isn't an option, and clinical trials may be available.
Further Reading
Medical disclaimer: This article is for general informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional about any medical condition or treatment decision.
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