Government Funding Lapse
Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted.

The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.

Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

TSNA

A type of harmful, cancer-causing chemical found in tobacco and tobacco smoke. TSNAs are formed when tobacco leaves are grown, cured, aged, and processed. Tobacco products can contain different amounts of TSNAs, depending on how they are made. Also called tobacco-specific nitrosamine.

TSNA

Search NCI's Dictionary of Cancer Terms