In November 1993, Kennedy Onassis was thrown from her horse while fox hunting in Middleburg, Virginia, and was taken to the hospital. A swollen lymph node was discovered in her groin, which was diagnosed as an infection at first. The fall made her health worse over the next six months. In December, Kennedy Onassis developed new symptoms, including a stomach ache and swollen lymph nodes in her neck. She was diagnosed with non-Hodgkin lymphoma, a type of blood cancer. She began chemotherapy in January 1994 and publicly announced the diagnosis. She continued to work at Doubleday, but by March the cancer had spread to her spinal cord and brain. By May it had spread to her liver and was diagnosed as terminal. 