“…Two bioarchaeological case studies with osseous lesions in the maxillary sinus from Portugal (3710–3620 BC , Silva & Wasterlain, ) and Spain (sixth–seventh centuries AD; Colard et al, ), both of which have been identified as COF, bear clear macroscopic similarities with the case presented here. As a rule, COFs (ICD‐O code: 9262/0) are monostotic unilocular tumours (Baumhoer, ; MacDonald, ; Slootweg & El Mofty, ) that can reach considerable proportions and cause significant functional and cosmetic problems (Agarwal, Kumar, Singh, & Usmani, ; Kuta, Worley, & Kaugars, ; Lawson et al, ).…”