My 6 year old has had enlarged lymph nodes in his neck for the last 9 months. He sweats at night sometimes needing a change of pjs as he is soaked through, this is not every night. He lost a kg in a month just after Christmas and although putting weight on since, he is still underweight. He says his tummy hurts, although I know that this can be completely unrelated. He had a blood test in February which showed low iron stores but everything else was normal. He had a blood test this week which showed low iron stores, lower than they were in February it is 9ug instead of 22-322 ug. He also has abnormal high haemaglobin, and a high hypochromic cell %. My initial concern was lymphoma in January but now I am not sure, although he is not a big eater he has a healthy diet and eats his read meat and fruit and vegetables. Has anyone experienced symptoms similar?