A source told The National Enquirer: ‘Kris always encouraged Bruce to have his face nipped and tucked.
He has had plastic surgery to remove excess fat above his eyelids. The Adam’s apple surgery is just following in that pattern.’
The surgery comes after rumours that Bruce is preparing to undergo a sex change.
The surgery to flatten the Adam's apple is often part of the sex change process.
The source revealed that Bruce’s sons, Brody and Brandon (who also feature in the popular reality show) have laughed off rumours that Bruce is becoming a woman.
They said: ‘The boys don’t think their father is trying to become a woman and simply laugh at rumors,' explained Radar's insider.’
The source continued: 'They do believe that Bruce became more conscience of his physical appearance and how he looked after Keeping Up With The Kardashians premiered. They blame their step-mother for all of the plastic surgery he has had over the years.’
Late last year TMZ first reported that Bruce was set to undergo the surgery- officially termed as a laryngeal shave- to which he confirmed: ‘I just never liked my trachea.’
Though sources close to Bruce have denied that he is set to undergo a sex change, his appearance has become more feminine of late as he has grown his hair longer and according to gossip websites has been spotted getting manicures.