Cancers of the oral cavity, which includes the lips, tongue, gums, inner lining of the cheeks, and the front two-thirds of the tongue, are often treated with surgery due to the unique anatomy and function of this area, as well as the nature of the cancer itself. Surgery is a primary treatment option for oral cavity cancers for several reasons:

1. Accessibility: The oral cavity is relatively accessible, making it feasible for surgical removal of tumors. Surgeons can directly visualize and access the tumor, enabling precise removal.

2. Early Detection: Many oral cavity cancers are detected at an early stage, when the tumor is still localized and has not spread extensively. Surgery can be highly effective in treating these localized tumors.

3. Tissue Conservation: Surgical techniques can be designed to remove the cancer while preserving as much healthy tissue as possible. This is particularly important in the oral cavity, where function (speech, swallowing, chewing) and appearance are essential.

4. Functional Restoration: After tumor removal, reconstructive surgery can help restore function and appearance. This might involve using tissue from other parts of the body to rebuild structures in the oral cavity.

5. Lymph Node Removal: Cancers in the oral cavity can spread to nearby lymph nodes. Surgery allows for the removal of affected lymph nodes, reducing the risk of further spread.

6. Precise Pathological Analysis: Surgical removal of the tumor provides a clear sample for pathological analysis. This helps determine the cancer's stage and grade, guiding further treatment decisions.

7. Limited Radiation Exposure: Surgery might be preferred in cases where radiation therapy could potentially damage nearby structures like the salivary glands or cause long-term side effects.

8. Curative Intent: Surgery can offer a curative approach for early-stage oral cavity cancers, aiming to completely remove the cancer and achieve remission.

However, it's important to note that not all oral cavity cancers are treated with surgery. The treatment approach depends on various factors such as the cancer's type, location, stage, the individual's overall health, and personal preferences. In some cases, a combination of treatments, such as surgery followed by radiation therapy or chemotherapy, might be recommended.

As with any medical decision, it's crucial for patients to have thorough discussions with their healthcare team to understand their diagnosis, treatment options, potential outcomes, and any associated risks or benefits.