Case 1, image 1: This 67-year-old man died of morphine (heroin) toxicity. He had a history of IVDU. Sections of lungs demonstrate abundant polarizable material.
Case 1, image 2: A picture using the polarizing. Actually difficult to take these images with a camera!
Case 1, image 3: A closer look. Be sure the refractile material is within the macrophages. Sometimes, there is a lot of refractile junk on the slide.
Case 1, image 4: Polarized at higher power.