From the El Paso Times:High-school senior Michael De Sousa (pictured) has a lot on his mind -- basketball practice, volunteering, the Air Force Academy -- and most important, his mom's degenerative disease, leukoencephalopathy.De Sousa's mother, Patricia De Sousa, was diagnosed with leukoencephalopathy, a degenerative brain disease, in 1997. Patients with this disorder tend to be diagnosed with