Whipple's disease: the value of upper gastrointestinal endoscopy for the diagnosis and follow-up.

Due to the systemic nature of Whipple's disease the clinical presentation may be highly variable. The diagnosis may therefore be unduly delayed. If untreated, Whipple's disease is still potentially lethal.

Diagnosis of ulcerative colitis in endoscopic biopsies.

Accurate diagnosis of "colitis", and hence the appropriate therapy, can be a big problem. Routine microscopy of endoscopic biopsies remains very important. Yet a biopsy diagnosis may also be difficult, and its accuracy depends upon the criteria used.