If a problem is linked to inadequate differentiation, what type of staining artifact is most likely?

• A. Overstaining
• B. Understaining
• C. No staining
• D. Uniform staining

Answer: (A)

The main idea is that differentiation in staining removes excess dye while preserving the target structures. If differentiation is inadequate, too much dye remains in the tissue, producing overstaining. The result is a darker, less contrasted slide where background and structures all pick up color, making details harder to distinguish. Understaining would happen if too much color were removed, not if differentiation was insufficient. No staining or uniform staining don’t reflect a failure of differentiation in the same way.