an enlarged liver or spleen in someone with mononucleosis would prohibit them from playing contact or collision-type sports. everyone's recovery from mono is different so there are really no set rules for when to return to sports. she would need to be individually cleared by her medical provider who would certify that (a) her liver enzymes have returned to normal (b) her liver and spleen are no longer enlarged and subject to injury and (c) she has recovered to the point of being able to handle the rigors of practice and games again.
daughter diagnosed w/ mono 19 day ago. only symptons ab pain / swollen glands. no fatigue. how long b4 return to sports? . looking at her you would not know she was sick. even the doctor said so. we took her to the doctor because we thought she injured her abdomin while training for volleyball. her ab pain was do to an inflammed liver.