Terminology O

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ONCOLOGIST - A doctor who specializes in treating cancer, either through surgery, radiation, or the administration of special drugs.

ONCOTYPEDX® - A genetic test offered by Genomic Health Inc. performed with tissue obtained either from a biopsy or prostatectomy that measures how aggressive a cancer is likely to be.

ORCHIECTOMY - Surgery to remove the testes, but not the scrotum.

OSTEOBLASTIC - The typical type of bone metastasis seen in prostate cancer. These lesions are characterized by abnormal bone generation (osteoblastic) rather than bone loss (osteolytic).

OSTEOPOROSIS - A demineralization of the bone which may accompany androgen deprivation therapy.