Jose Jesus Echegollen-Barrueta (Echegollen), federal inmate #31871-048, appeals the dismissal without prejudice of his complaint against the University of Texas Medical Branch (UTMB) and “Doe” defendants for failure to perfect timely service on any of the named defendants. Because Echegollen’s brief wholly fails to address the basis of the district court’s dismissal of his complaint, he has waived any argument regarding his failure to serve the defendants. See Yohey v. Collins, 985 F.2d 222, 224-25 (5th Cir. 1993); Brinkmann v. Dallas County Deputy Sheriff Abner, 813 F.2d 744, 748 (5th Cir. 1987).

AFFIRMED.