Sometimes metastatic high grade hepatocellular carcinoma has a "could be anything" appearance. Immunohistochemistry can be helpful....

This small intestinal gastrointestinal stromal tumor (GIST) has invaded the mucosa, a feature indicating aggressive behavior. This...

Pancreatic tissue was removed from a young adult for unclear reasons. Atrophy and multifocal low grade pancreatic intra-epithelial...