Olympic swimmer Dara Torres' cancer-stricken coach is waiting to learn whether his sister might be a match for a bone marrow transplant.

Michael Lohberg has aplastic anemia, in which the bone marrow doesn't produce enough new cells, leading to fatigue, increased risk of infection and uncontrolled bleeding. Treatment can involve blood transfusions or a bone marrow transplant.

The 58-year-old had hoped to be in Beijing to see his 41-year-old pupil compete in her record fifth Olympics, then a few weeks after trials was diagnosed with a rare, serious form of cancer. [read more]