ASCP SCYM study guide with
questions and correct answers graded
a+ for 2026 assured excel!!
FLOW CYTOMETRY MASTER REVISION GUIDE – PART 2
Clinical Applications, Immunophenotyping, Quality Control & Laboratory Management
SAMPLE PROCESSING
1. Sample Processing
CORRECT ANSWER:
• Optimized antibody concentration
• Defined range of cell numbers
• Defined sample handling procedures
• Controlled time and temperature
• Defined acceptable delay before acquisition
IMPORTANT CD MARKERS
Marker CORRECT ANSWER
CD2 T Cells, NK Cells
CD3 T Cells
CD4 T Helper Cells, Monocytes (dim)
CD5 T Cells, Some B Cells
CD8 Cytotoxic T Cells, Macrophages
, Marker CORRECT ANSWER
CD10 Immature T Cells, B Cells, PMNs
CD13 Monocytes, PMNs
CD14 Monocytes, PMNs (dim)
CD16 NK Cells, PMNs, Monocytes
CD19 B Cells
CD20 B Cells
CD25 Activated T Cells
CD33 Monocytes
CD34 Stem/Progenitor Cells
CD45 Leukocytes
CD56 NK Cells, Monocytes (dim)
Anti-Kappa B Cells
Anti-Lambda B Cells
TdT Immature Lymphocytes
MONOCLONAL ANTIBODY STAINING
2. Direct Staining
CORRECT ANSWER:
• Rapid single-step staining
• Multiple antibodies from the same host can be used
3. Indirect Staining
CORRECT ANSWER:
• Secondary antibody amplifies signal
questions and correct answers graded
a+ for 2026 assured excel!!
FLOW CYTOMETRY MASTER REVISION GUIDE – PART 2
Clinical Applications, Immunophenotyping, Quality Control & Laboratory Management
SAMPLE PROCESSING
1. Sample Processing
CORRECT ANSWER:
• Optimized antibody concentration
• Defined range of cell numbers
• Defined sample handling procedures
• Controlled time and temperature
• Defined acceptable delay before acquisition
IMPORTANT CD MARKERS
Marker CORRECT ANSWER
CD2 T Cells, NK Cells
CD3 T Cells
CD4 T Helper Cells, Monocytes (dim)
CD5 T Cells, Some B Cells
CD8 Cytotoxic T Cells, Macrophages
, Marker CORRECT ANSWER
CD10 Immature T Cells, B Cells, PMNs
CD13 Monocytes, PMNs
CD14 Monocytes, PMNs (dim)
CD16 NK Cells, PMNs, Monocytes
CD19 B Cells
CD20 B Cells
CD25 Activated T Cells
CD33 Monocytes
CD34 Stem/Progenitor Cells
CD45 Leukocytes
CD56 NK Cells, Monocytes (dim)
Anti-Kappa B Cells
Anti-Lambda B Cells
TdT Immature Lymphocytes
MONOCLONAL ANTIBODY STAINING
2. Direct Staining
CORRECT ANSWER:
• Rapid single-step staining
• Multiple antibodies from the same host can be used
3. Indirect Staining
CORRECT ANSWER:
• Secondary antibody amplifies signal