A patient who has been wearing denture for quite long time reported with flabby tissue behind the ridge. What will be the most likely diagnosis?

The epulis fissuratum is a tumorlike hyperplasia of fibrous connective tissue that develops in association with the flange of an ill-fitting complete or partial denture. Although, the simple term 'epulis' sometimes is used synonymously for epulis fissuratum, epulis is actually a generic term that can be applied to any tumor of the gingiva or alveolar mucosa.