Which one of the following disease processes presents as a break in the protective layer of soft tissue, leaving a raw and often painful lesion that may bleed?

An ulcer is characterized by a break in the protective layer of soft tissue, leading to a lesion that appears raw and may be painful. This condition often results from the loss of epithelial tissue and can occur in various locations, including the oral cavity. The exposed underlying layers can bleed and are sensitive to irritation and external factors, leading to discomfort for the patient.

Ulcers can arise from various causes such as trauma, infection, or underlying systemic diseases. Their painful nature and the possibility of bleeding make them distinct from other options. In contrast, benign tumors and cysts typically do not cause a direct break in the soft tissue, but rather are growths that may or may not cause discomfort depending on their size and location. Infections might lead to tissue breakdown, but they usually present with additional symptoms like swelling, warmth, and pus formation, rather than just a raw lesion alone.

Thus, the defining characteristics of ulcers are what make this answer the most accurate for describing a break in the soft tissue with noticeable symptoms.