Squamous Cell Carcinoma

Squamous cell carcinoma of the conjunctiva is a serious type of eye cancer that tends to affect older individuals, both men and women. It is often linked to risk factors such as prolonged exposure to strong sunlight and certain papilloma viruses. While less common than ocular melanoma, squamous cell carcinoma remains an important condition to diagnose and treat promptly due to its potential to cause significant damage.

This type of carcinoma typically begins by spreading across the surface of the conjunctiva, within the epithelium. In its early stage, this is referred to as carcinoma in situ, which is somewhat analogous to melanoma in situ or primary acquired melanosis (PAM) with atypia, conditions commonly associated with ocular melanoma. In this stage, the cancer has not yet invaded deeper tissues but remains confined to the surface.

If left untreated, squamous cell carcinoma can progress. It may form a nodule and become invasive, spreading deeply into surrounding tissues. This stage, known as invasive carcinoma, is far more dangerous. If neglected, the cancer can infiltrate the tissues around the eye and even the eye itself, causing significant structural and functional damage. Additionally, it has the potential to metastasize, spreading through blood vessels and lymph channels to the glands in the neck and, in advanced cases, to other parts of the body.

Carcinoma in situ often responds well to chemotherapy eye drops, such as 5-FU, mitomycin C, or interferon, which can effectively eradicate the cancer in its early stages. However, once the carcinoma becomes invasive, surgical excision is typically required. This is often followed by additional treatments, such as chemotherapy drops and/or radiotherapy, to minimize the risk of recurrence and manage the disease effectively.

Like ocular melanoma, early detection and treatment of squamous cell carcinoma are crucial to improving outcomes and preserving overall health.