Kinslee Mack’s fifth birthday was an especially big one for the Marion, Iowa girl. Kinslee was born with two rare congenital disorders, including TBCD, an ultra-rare genetic disorder that affects the brain, spinal cord, and other parts of the body. There are fewer than 50 cases in the world. Patients diagnosed with TBCD – tubulin folding cofactor D – typically have a lifespan of three to five…