Colorectal-cancer screening in the United States is a success story. The American Cancer Society recently reported that rates of death from colorectal cancer are down by 46% from their peak.1 There is good evidence that screening efforts have played an important role in the trend.2 However, work remains to be done, since approximately one third of Americans report not being current with screeni...

Chronic aspirin ingestion in childhood is not uncommon, often goes undetected, and may cause serious anaemia from occult blood loss. Five cases are described.

Background and study aims: Chronic hemodialysis patients are susceptible to a lot of complications. Gastrointestinal bleeding is one of the most serious and important complications in these patients result from many contributing factors like chronic uremia, stress and drugs. The present study is concerned with assessment the magnitude of occult gastrointestinal bleeding in chronic hemodialysis ...

Occult hepatitis C infection is regarded as a new entity that should be considered when diagnosing patients with a liver disease of unknown origin. Using an ultrasensitive real-time PCR assay, we demonstrated that occult hepatitis C virus (HCV) infection cannot be found in peripheral blood mononuclear cells of patients with cryptogenic liver diseases, HCV--associated systemic vasculitis, or con...