Background <p>Carcinoma cuniculatum is a rare variant of oral squamous cell carcinoma that is frequently misdiagnosed and inadequately treated because of its overlapping clinical, histopathological, and radiological features. Clinically, these lesions commonly present as ulcerative growths, while radiological findings often mimic osteomyelitis. Histopathological diagnosis is challenging, as multiple biopsies may reveal only tissue necrosis without evidence of dysplasia or malignancy.</p> Case Presentation <p>This case report describes a female patient with a persistent oral lesion in whom multiple biopsies were negative for malignancy. However, following surgical resection, the final histopathological examination established the diagnosis of carcinoma cuniculatum.</p> Histopathological Findings <p>Microscopically, the tumor demonstrated features of a well-differentiated squamous cell carcinoma lacking significant cytological atypia. The lesion was characterized by deep infiltrative, large, branching, keratin-filled crypts and cavities resembling rabbit burrows, which are considered characteristic of carcinoma cuniculatum.</p> Conclusion <p>Carcinoma cuniculatum remains a diagnostic challenge because of its deceptively benign histological appearance and nonspecific clinical and radiological findings. Awareness of its characteristic histopathological features is essential for timely diagnosis and appropriate management.</p>