Note the variable cellularity in these needle biopsies taken from a thoracic solitary fibrous tumor, the site where they were described...

This is a beautiful gastric foveolar-type adenoma. The PAS/Alcian blue combination stain shows only gastric foveolar-type cells lining...

A chondroid chordoma abutting respiratory sinuses (in the head). It's sometimes a struggle with this versus skeletal myxoid...