A basal cell carcinoma usually grows slowly, so treatment does not always need to happen immediately. However, there is no single “safe” waiting period for everyone. The right timing depends on the tumour’s location, size, growth pattern and individual risk factors.

A Short Wait Is Often Possible

BCC is the most common type of skin cancer and usually develops slowly. It also very rarely spreads to other parts of the body, which means treatment may sometimes be planned less urgently than for other skin cancers.

Cancer Research UK explains that people referred with a suspected basal cell carcinoma may sometimes wait up to a few months to see a specialist. Because most BCCs take years to develop, this type of planned wait is unlikely to cause harm in many cases.

However, this should not be interpreted as permission to delay treatment indefinitely. Your dermatologist should decide how quickly the lesion needs treatment after considering its individual characteristics.

In selected patients with slow-growing BCCs in non-critical locations, a specialist may even recommend monitoring rather than immediate treatment. This is a clinical decision rather than something you should choose without medical advice.

Some BCCs Should Be Treated Sooner

Not every basal cell carcinoma behaves in exactly the same way. Some tumours are considered higher risk because of their location, size, borders, subtype or previous treatment history.

Location is particularly important. A BCC close to the eye, nose or ear can become more difficult to treat if it continues growing because there is less spare healthy tissue around these delicate structures. The British Association of Dermatologists notes that treatment can become more complicated when a cancer has been left for a long time or occurs in an awkward location.

A recurrent tumour or one with a more aggressive growth pattern may also need different treatment from a small, clearly defined BCC on a lower-risk part of the body. These factors may influence both how quickly treatment is recommended and whether standard excision, Mohs surgery or another approach is most appropriate.

If your dermatologist has recommended treatment within a particular timeframe, follow that advice rather than delaying because BCC is generally described as slow-growing.

What Can Happen If You Wait Too Long?

The main concern with untreated basal cell carcinoma is usually local growth rather than distant spread. A BCC can gradually invade surrounding skin and tissue, potentially leaving a larger area that needs removing.

This can affect the complexity of surgery. NHS England specifically notes that delays in treating BCC can sometimes mean patients require more invasive surgical procedures.

For example, a small lesion may initially be suitable for straightforward removal and stitching. If it grows substantially, surgery could leave a larger wound that requires reconstruction with a skin flap or graft. Most BCCs are treated surgically, although the exact approach depends on the individual cancer.

Growth can be difficult to judge simply by looking at the surface. This is another reason not to decide for yourself that a lesion is safe to leave because it appears small or has not caused pain.

Contact your medical team while waiting if the area starts growing noticeably, repeatedly bleeding, ulcerating or otherwise changing. Cancer Research UK also advises speaking to your GP if you are worried about how long you have been waiting for a specialist appointment.

Let the Tumour Determine the Timeline

So, how long can you wait to remove a basal cell carcinoma? For many slow-growing, lower-risk BCCs, a planned wait of several weeks or even a few months may be clinically acceptable. However, that does not apply to every tumour, particularly cancers in sensitive locations or those with higher-risk features.

The safest approach is to base your timeline on a specialist assessment rather than a general rule. If you have already been diagnosed with BCC, ask how your tumour has been classified, whether waiting is likely to affect the treatment required and what changes you should report while you wait.

If you are concerned about a suspected or confirmed basal cell carcinoma, contact Dr Arif Aslam’s team for a specialist assessment and personalised advice on whether treatment should be arranged promptly or can safely be planned for a later date.