Beaumont Enterprise, July 2, 2007 BEAUMONT - Six-year-old Nyseya Brown tried not to giggle as the gigantic X-ray machine hovered over her body, scanning her bones and blood.  The kindergartener has sickle cell anemia and the bone scan was to help doctors look at the trapped blood cells causing the sharp, prickling pain in her left knee and back.  Years ago her mom, Denise Brown, would have had to take her to Galveston or Houston for routine health checkups but now she can go to a specialty clinic offered at Memorial Hermann Baptist Beaumont Hospital. The clinic opened about two years ago. About once a month, Brown goes to the specialty clinic to see Dr. Frederick Huang, director of pediatric hematology and oncology at the University of Texas Medical Branch in Galveston.  Huang, who started seeing five patients each month in November 2005, comes to Beaumont twice a month to see children like Nyseya who have rare blood disorders and cancer. He sees about 15 a session now.