<s>[INST] my daugheter is 7 she has had two dx mesenteric adenitis however for the last 6 months a constant belly ache. two ultrasounds that confirmed dx one in Dec and one today. She also has vomiting with pain and days with no other real explanation. I am an ER nurse for the last 16 years and of course I have many concerns ie/ lymphoma etc. What else are we missing ? she has also had a weight loss of 5 pounds since december. [/INST] HI...mesenteric amenities without weight loss or other constitutional symptoms doesn't not need further evaluation. But as you say she has lost 5 pounds in the past 11 months, then definitely is a cause of concern. But i don't think this is something related to neoplasm as it won't go on like this for so many months without full-blown manifestations. I suggest you work with a CT abdomen and if possible a CT guided biopsy of the lymph nodes. Regards -  </s>