Medical

A slow-growing tumor of stromal cells which occurs primarily in the genital and pelvic regions. This tumor is much more common in women.

A grading system for prostate carcinoma. See Gleason score.

The obstruction of the pulmonary artery or a branch of it leading to the lungs by a blood clot, usually from the leg, or foreign material causing sudden closure of the vessel.

An antiestrogen (a drug that blocks the effects of estrogen) which competes with estrogen for binding sites in target tissues such as breast. Tamoxifen has been widely publicized.

Infection from a type of parasitic worm that hatches in the intestines and lives there.

Bloody colitis (inflammation of the bowel) caused by E. coli, usually by the strain E. coli 0157:H7.

Bloody colitis (inflammation of the bowel) caused by E. coli, usually by the strain E. coli 0157:H7.

Bloody colitis (inflammation of the bowel) caused by E. coli, usually by the strain E. coli 0157:H7.

A small roll of tobacco leaf for smoking. The word "cigar," from the Spanish "cigarro," first appeared in English in 1730.

The Salk Institute for Biological Studies , a prominent independent non-profit institution doing basic science research concerned with human health.