Prost(r)ate cancer
The lower back pain that was pestering Raul Roco was, according to his campaign manager Dr. Jaime Galvez-Tan, due to prostate cancer. The Philippine Star reports that tests done in the Philippines suggest that Roco has prostate cancer and that he would be seeking second opinion in the US upon the advise of his doctors.

My sister's classmate's father was also diagnosed with prostate cancer late last year, and, I've heard, was promptly advised to gorge on tomatoes. For more information on prostate cancer, the US National Cancer Institute offers some information.