Galveston County Daily News, July 25, 2007 GALVESTON - A University of Texas Medical Branch doctor and his identical twin brother are to star next month in a television program on The Learning Channel about a rare case that tested their expertise in immunology. Both allergy immunology fellows, David Redding of the medical branch and Alan Redding, of the University of Tennessee-Memphis, will feature in an episode of "Diagnosis X," about IPEX syndrome, a rare disease that kills infants and toddlers. The show's producer thought identical twin doctors would provide an interesting twist for the program's format, which mixes doctors with actors in drama-documentaries about "brain-teaser" cases that test doctors' diagnostic skills. "She asked if we had an interesting case they could use," Redding said of a conversation he and his brother had with the producer when they first met her during a medical conference in San Diego. "Alan thought of a recent patient with a rare and difficult-to-diagnose disease, IPEX syndrome." The condition, the full name of which is immunodysregulation polyendocrinopathy enteropathy X-linked syndrome, is a recently discovered immunodeficiency disease that's always fatal by age 2 or 3 - usually by age 12 months - without a bone-marrow transplant.