Cholesteatoma

Cyst-like mass lined with keratinized squamous epithelium and filled with desquamating debris in the middle ear. Progressive enlargement may lead to bony/soft tissue destruction. (Courtesy of Dr. M. Hawke)

Carcinoma

Colon Carcinoma (Courtesy of Dr. G. Kandel)

Angiodysplasia

Angiodysplasia (“Watermelon stomach”) Usually presents as anemia and can be treated by endoscopic coagulation. Photo courtesy of Dr. G. Kandel.