A non-healing ulcer with everted edges is highly suggestive of malignancy, often seen in squamous cell carcinoma. The chronicity and everted margins indicate invasive and uncontrolled growth, distinguishing it from benign ulcers. This warrants urgent biopsy and further oncological evaluation. In contrast, other options typically indicate benign or inflammatory conditions. Early recognition of such malignant features is crucial for timely diagnosis and management, improving surgical outcomes.

Reference: Bailey & Love’s Short Practice of Surgery, Norman S. Williams, 27th Edition.