A panoramic radiograph shows a supernumerary tooth. Which diagnosis is MOST likely?

Cleidocranial dysplasia is classically associated with multiple supernumerary teeth, delayed eruption, and absent/hypoplastic clavicles. Gardner syndrome has osteomas/supernumeraries but is rarer. Down syndrome (trisomy 21) causes microdontia and missing teeth, not excess. Amelogenesis imperfecta affects enamel structure, not tooth number.