Mesenteric lymphadenitis is a clinical condition that affects mostly children and teenagers. Its symptoms include fever, severe abdominal pain, nausea, and, in some cases, diarrhea, constipation, and acute abdomen. This paper describes the case of a 16-year-old patient with mesenteric lymphadenitis submitted to an exploratory laparoscopy for suppurative lymph nodes that evolved to a drastic reduction of ovarian reserve. Because of the patients age, she was offered cryopreservation of her ovarian tissue.