ASCP Study Guide 2026
Everything you need to pass the ASCP exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 ASCP Exam Format at a Glance
📚 ASCP Topics to Study (21)
✍️ Sample ASCP Questions & Answers
1. What staining result indicates that sections were not completely deparaffinized before H&E staining?
Residual paraffin acts as a barrier to aqueous dyes, producing unstained patches or areas with poor dye penetration.
2. What is the primary purpose of fixation in tissue processing?
Fixation prevents autolysis and microbial decomposition by cross-linking proteins to preserve tissue architecture.
3. What is the purpose of the water bath used during paraffin sectioning?
The water bath (typically 40–45°C) allows compressed sections to expand and flatten before being picked up on slides.
4. What IHC marker is used to confirm the presence of muscle differentiation in a tumor?
Desmin and smooth muscle actin are cytoskeletal proteins expressed in muscle cells; their IHC positivity confirms muscle differentiation in tumor cells.
5. What does a reagent QC failure on a negative control indicate?
A positive signal on a negative control means non-specific staining is occurring, which could lead to false-positive results in patient samples.
6. What is the term for the process of surrounding embedded tissue with paraffin wax in a mold?
Embedding is the process of orienting tissue in molten paraffin within a mold to create a block for sectioning.