I was a gutka chewer since 4-5 years and quit recently and chewing nicotex 2mg 4-5 per day .. i got myself checked by a dentist who said i have no lesions or white patch .. also went to an ent who checked my mouth and throat without endoscope with the headlight and an instrumnt to depress my tongue .. he too said all is own just to do steam inhalation .. now i m anxious about throat or pharyngeal cancer ... as i feel like something the base of my tongue ... do i need to go for endoscopy ... is throat , pharyngeal and laryngeal cancer caused by gutka ...