The concept of “rare lesions” in oral pathology demands critical reassessment. Through a series of published case reports—including the 101st documented central mucoepidermoid carcinoma, the 33rd intraosseous lipoma of the jaws, the 11th posterior mandibular glandular cyst, and the 4th intraosseous hemangioma of the mandible—this presentation argues that rarity is not a function of
biological absence, but of diagnostic neglect
These lesions exist; they are simply not seen.
The author proposes a paradigm shift: rare lesions are not rare to exist—they are rare to diagnose. This reframing has implications for clinical training, diagnostic vigilance, and the epistemology of lesion classification. By confronting the inertia of recognition, we elevate both the diagnostic discipline and the patients it serves.

Keywords: diagnostic rarity, oral lesions, case reports, epistemic bias, pathology education