Keratocystic odontogenic tumour (KCOT) is of clinical importance
because of its pronounced tendency to recur.
Among the factors that complicate KCOT management
are its protean radiological presentations. KCOT showing
involvement of the maxillary antrum in the absence of an
associated impacted tooth is exceptionally rare. In these
instances an odontogenic source of the lesion is often not
suspected and the clinico-radiological features may be
misinterpreted. We report such a case and highlight pertinent
clinical and radiological features of antral KCOT.