Basal cell carcinoma of the eyelid
BCC, sometimes called a rodent ulcer, is the most common cancer of the eyelid. It is slow-growing and rarely spreads beyond the local area, but it is locally destructive and must be treated. The good news is that, caught early, it is one of the most curable cancers there is.
The most common eyelid cancer, accounting for roughly 90% of cases
Basal cell carcinoma arises from the basal cells, which form the deepest layer of the epidermis. It is by far the most common malignant tumour of the eyelid, making up around 90% of all eyelid skin cancers. The lower eyelid is the most frequently affected site, followed by the medial canthus (the inner corner of the eye), the upper eyelid, and the lateral canthus.
BCC is a cancer that grows very slowly (typically only 1 to 2 millimetres per year) and almost never spreads to other parts of the body. In that sense it is distinct from many other cancers. However, it is locally destructive. Without treatment, it will gradually erode the eyelid, the orbit, the lacrimal drainage system, and, in advanced cases, the sinuses and skull base. The word "curable" is entirely appropriate for an early, well-defined BCC, but the window of straightforward cure does not remain open indefinitely.
The informal name "rodent ulcer" refers to the gnawing, destructive way the tumour eats through local tissue over time. It is an old term, but still widely used.
What a BCC looks like on the eyelid
The classic BCC appears as a pearly, slightly translucent nodule with a raised, rolled border. On close inspection, fine blood vessels (telangiectasia) are often visible running across the surface. The centre may be depressed, ulcerated, or covered with a crust that bleeds when it is disturbed. In the early stages, particularly on the eyelid, BCC can look convincingly like a benign lump, a small cyst, or even a persistent chalazion.
One of the most important clinical signs is the loss of eyelashes, known as madarosis, in the area directly overlying the tumour. When a lump on the eyelid margin is associated with missing lashes, that combination always requires specialist assessment.
There are several subtypes of BCC, including nodular, morphoeic (sclerosing), and infiltrative forms. The morphoeic subtype is particularly deceptive because it has an ill-defined, scar-like appearance without the classic rolled border, and it tends to spread beneath the surface further than it appears to on examination.
- A pearly or skin-coloured lump on the lower eyelid or inner corner that has been present for more than a few weeks and is not resolving
- Eyelashes missing from the lid margin adjacent to a lump
- A lump with a central ulceration, crust, or surface that bleeds without trauma
- Any previous skin cancer elsewhere on the face or body, with a new eyelid lump
Cumulative sun exposure is the primary risk factor
The principal cause of eyelid BCC, as with BCC elsewhere on the skin, is cumulative ultraviolet radiation exposure over a lifetime. The lower eyelid, which receives more direct sunlight than the upper lid, is correspondingly the most commonly affected site. Fair skin, light eye colour, and a tendency to burn rather than tan are associated with higher risk.
Other risk factors include a personal or family history of skin cancer, a history of significant immunosuppression (for example following organ transplantation), and prolonged exposure to arsenic, which is now uncommon but was historically significant.
Genetic conditions such as Gorlin syndrome (basal cell naevus syndrome) and xeroderma pigmentosum are associated with multiple BCCs developing from an early age, though these are rare. For most people, BCC is a condition of cumulative sun exposure over decades, and it is correspondingly most common over the age of sixty.
Surgery is the primary treatment
The standard treatment for eyelid BCC is surgical excision with histological margin control. This means that the tumour is removed with a margin of normal tissue around it, and the edges of the excised specimen are examined under a microscope to confirm that no tumour cells remain at the margin.
Mohs micrographic surgery
For eyelid BCCs, particularly at the medial canthus, Mohs surgery is frequently recommended. Developed by Dr Frederic Mohs in the 1930s, this technique involves removing thin layers of tissue and examining each layer for tumour cells while the patient waits. Layers are removed only from the areas where tumour is still present. This allows the surgeon to clear the tumour completely while preserving the maximum amount of normal tissue, which is especially important around the eyelid where every millimetre matters for function.
Mohs surgery is performed by a dermatological surgeon. Once the tumour is cleared, the resulting wound is then handed to an oculoplastic surgeon for reconstruction.
Radiotherapy
External beam radiotherapy is an effective alternative for patients who are not suitable for surgery, or for selected cases where surgery would cause unacceptable functional deficit. Cure rates are good for small tumours, though treatment requires multiple sessions over several weeks, and late radiation effects can affect the eyelid over years.
Topical and systemic options
Topical treatments such as imiquimod and 5-fluorouracil are not appropriate for eyelid BCCs because of the proximity to the eye and the limitations of topical penetration for any but the most superficial lesions. Hedgehog pathway inhibitors (vismodegib, sonidegib) are available for advanced or metastatic BCC, though metastatic eyelid BCC is vanishingly rare.
Mr Chris Matthews is a consultant oculoplastic surgeon who performs assessment, biopsy, excision, and reconstruction for eyelid skin cancers including BCC. If you have a lump on your eyelid that concerns you, a consultation is the right first step.
Book a consultation ›Eyelid reconstruction
The eyelid is not just a cosmetic structure. It protects the eye, spreads the tear film, and plays a critical role in maintaining the ocular surface. Reconstruction after tumour excision is therefore both a functional and an aesthetic challenge, and it requires a surgeon with specific training in this area.
Small defects, typically involving less than a quarter of the eyelid, can often be closed directly. Larger defects require reconstructive techniques that borrow tissue from adjacent structures, such as advancement flaps, transposition flaps, or composite grafts involving the upper or lower eyelid, the cheek, or the palate.
Oculoplastic surgeons are specifically trained in these techniques because their background spans both ophthalmology (with its understanding of eyelid function) and plastic and reconstructive surgery. The goal is always to restore an eyelid that functions well, protects the eye, and looks natural.
For small, well-defined BCCs, surgery is performed under local anaesthetic, often as a day case, and most patients recover within a few weeks. However, the recovery picture changes significantly if the tumour was large or required complex reconstruction. Some patients may require their eyelids to be temporarily sutured together as part of the reconstruction (a procedure known as a tarsoconjunctival flap, sometimes called a Hughes flap), which allows tissue to be transferred from the upper eyelid to rebuild a missing lower eyelid margin. This means the eye is closed for several weeks, and the overall recovery for larger cases can extend to several months.
Common questions
What does a basal cell carcinoma on the eyelid look like?
BCC typically appears as a pearly or skin-coloured lump with a raised, rolled border. As it grows it often develops a central ulceration or crust. It is usually painless, and it grows slowly over months to years. On the eyelid it can be easy to mistake for a cyst, a persistent chalazion, or even a benign skin growth.
Can BCC spread to other organs?
Eyelid BCC very rarely metastasises, meaning spread to lymph nodes or distant organs is exceptionally uncommon. Its danger lies in local destruction: without treatment it will erode the eyelid, orbit, and adjacent facial structures over time.
Will I lose my eyelid?
The aim of modern oculoplastic surgery is to preserve and reconstruct the eyelid. Most patients, even those with moderately advanced tumours, end up with a functional, cosmetically acceptable eyelid after reconstruction. The larger and more invasive the tumour, the more complex the reconstruction, which is one of the reasons early diagnosis and treatment is so strongly advised.
Is BCC on the eyelid treated on the NHS?
Yes. Eyelid BCC is treated within the NHS. Because BCCs grow so slowly, they are not usually referred on the urgent two-week wait cancer pathway and are more commonly managed through routine dermatology or oculoplastic referral. Your GP can refer you to the appropriate clinic. Private oculoplastic surgeons can also see you promptly for assessment, biopsy, and treatment if you prefer not to wait for an NHS appointment.
How long does recovery take after eyelid BCC surgery?
It depends considerably on what the surgery involved. For a small BCC excised with a straightforward repair, most patients have bruising and swelling for one to two weeks and look presentable within three to four weeks. However, if the BCC was large and required full eyelid reconstruction, recovery can take much longer. Some patients need their eyelids to be surgically sewn together for several weeks as part of the reconstruction process (using a Hughes tarsoconjunctival flap, which transfers tissue from the upper eyelid to rebuild the lower). In these cases the overall recovery, including the period with the eye closed and the subsequent healing, can range from a few weeks to several months. Your surgeon will discuss the expected timeline in detail before you proceed.
