  We demonstrate that families of vortex solitons are possible in a
bi-dispersive three-dimensional nonlinear Schrodinger equation. These solutions
can be considered as extensions of two-dimensional dark vortex solitons which,
along the third dimension, remain localized due to the interplay between
dispersion and nonlinearity. Such vortex solitons can be observed in optical
media with normal dispersion, normal diffraction, and defocusing nonlinearity.
