Dentigerous Cyst Associated With a Dysmorphic Supernumerary Tooth Lacking Root Formation and an Identifiable Pulp Chamber: A Case Report

Background Dentigerous cysts are typically associated with unerupted teeth with normal morphology, and their occurrence in dysmorphic teeth is poorly documented. Case Presentation A 76‐year‐old man presented with maxillary swelling. Imaging revealed a cystic lesion occupying the maxillary sinus with a tooth‐like radiopaque structure. The lesion was surgically removed. Histopathology supported a diagnosis most consistent with a dentigerous cyst associated with a dysmorphic tooth‐like structure with no clearly identifiable root formation and a pulp chamber. Conclusion This case suggests that dentigerous cysts may arise in association with severely dysmorphic teeth, even without root formation or a pulp chamber, and may indicate that internal tooth structure is not indispensable for cyst development.