Slide 330A
Adenoma - Thyroid gland. The Benign tumor is well-circumscribed by a capsule. The tumor consists of a compact mass of small follicles, most of them devoid of colloid. Also, note the difference between the appearance of the tumor and that of the surrounding normal thyroid.

Slide 295B
Adenocarcinoma - Prostate - neoplasm of glandular origin.
The image shows pleomorphic malignant glands.