Overview
Plasma Cell Disorders . Laboratory Summary, laboratory pattern lookup. Patterns suggest screening suspicion; integrated marrow, flow, and genetics establish classification per hematopathology.
Classification
| Feature | Typical screening pattern | Confirmatory direction |
|---|---|---|
| Rouleaux | PB smear | SPEP/IFE reflex |
| M-protein | Serum/urine | Immunofixation typing |
| Marrow | Plasma cell % | Flow plasma cell assessment |
Morphologic Features
Morphology alone does NOT establish final diagnosis, hedged throughout.
Laboratory Characteristics
- Verify institutional blast thresholds and reflex algorithms.
Reference Intervals
Blast and ALC thresholds vary, per institutional protocol.
Clinical and Laboratory Significance
Screening suspicion vs confirmed classification, see Module 12 capstone lesson.
Differential Considerations
See hematologic-malignancy-classification-overview for cross-entity comparison.
Comparison Tables
Classification Frameworks
WHO Haematolymphoid Tumours and ICC haematolymphoid classifications provide diagnostic frameworks, edition-specific criteria applied by hematopathologists, not inferred from CBC alone.
Laboratory Notes
- Integrate laboratory findings with clinical context; verify local reference intervals and reflex rules.
References
Authoritative textbooks, guidelines, and reviews supporting this reference entry. Verify reference intervals, critical limits, and reflex criteria against institutional protocols and current guideline editions.
Textbooks
- Arber DA, Orazi A, Hasserjian RP, et al. Atlas of Diagnostic Hematology. 4th ed. Elsevier; 2023.
- Bain BJ. Blood Cells: A Practical Guide. 6th ed. Wiley-Blackwell; 2022.
- Rodak BF, Carr JH. Rodak's Hematology: Clinical Principles and Applications. 6th ed. Elsevier; 2020.
- McKenzie SB, Williams JL. Clinical Laboratory Hematology. 4th ed. Pearson; 2022.
- Hoffbrand AV, Moss PAH, Pettit JE. Essential Haematology. 8th ed. Wiley-Blackwell; 2019.
CLSI and Professional Guidelines
- International Consensus Classification of Myeloid Neoplasms and Acute Leukemias (ICC). Blood. 2022;140(11):1200–1228.
WHO Publications
- World Health Organization. WHO Classification of Haematolymphoid Tumours. 5th ed. Volume 11. Lyon: IARC Press; 2024.
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