Atlas of Pathology Back to Previous Image URBANA ATLAS OF PATHOLOGY Image Number 90 - Thyroid, follicular adenoma, gross Arrow 1 indicates the external surface of the adenoma. Notice the extreme vascularity of the capsule. Arrow 2 indicates the capsule. Arrow 3 indicates areas of hemorrhage and arrow 4 indicates areas of cystic degeneration within the tumor. Click for image To Next Image To Table of Contents To Alphabetical Index To Start