Cone beam computed tomography with oral contrast for accurate diagnosis and surgical planning of pharyngeal leakage and fistula: a case series.

•We evaluated pharyngeal leakage and fistulae using contrast CBCT.•Contrast CBCT provides three-dimensional images taken in a sitting position.•Contrast CBCT is useful for accurate diagnosis of leakage and fistula.•Contrast CBCT may be an effective option to detect pharyngeal leakage and fistulae.