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Myelodysplastic Syndromes (MDS)

What?
Myelodysplastic syndromes are a group of disorders caused by blood cells that are poorly
• Hairy Cell Leukemia ... Nutritional: vitamin B12 ... • Copper deficiency ... #diagnosis #hematology ... #oncology
Pancytopenia - Differential Diagnosis

Congenital Diseases:
• GATA2 deficiency
• Fanconi’s anemia
• Wiskott-Aldrich syndrome
• Ribosomopathy or telomeropathy

Cancer:
• Leukemia
• Lymphoma

Inflammatory
• Fanconi’s anemia ... Wiskott-Aldrich syndrome ... Cancer: • Leukemia ... consumption • Vitamin B12 ... Differential #Diagnosis #Hematology
Causes of Thrombocytopenia - Differential Diagnosis Algorithm
 
Decreased Megakaryopoiesis
 • Aplastic Anemia
 • Toxic Damage (e.g.
Megakaryopoiesis • Aplastic Anemia ... Leukemia, Tumour ... Megakaryopoiesis • B12 ... Non-lmmune: • HELLP Syndrome ... Algorithm #Causes #Hematology
Causes of Thrombocytosis - Differential Diagnosis Algorithm
Spurious:
 • Artifact (redo CBC)
Autonomous:
 • Essential thrombocytosis
 • Polycythemia
Chronic Myelogenous Leukemia ... Non malignant hematologic ... effect following treatment ... malignancy • Iron deficiency ... anemia #Thrombocytosis
Causes of Neutropenia with Pancytopenia - Differential Diagnosis Algorithm
Sequestration:
 • Splenomegaly
Marrow Infiltration:
 • Hematologic and non-hematologic
Infiltration: • Hematologic ... and non-hematologic ... Toxins • Aplastic Anemia ... Myelodysplasia Nutritional deficiency ... : • B12/folate
Anemia - Underproduction Diagnostic Algorithm
 - Iron deficiency anemia
 - Anemia of chronic inflammation
 - Anemia
Algorithm - Iron deficiency ... anemia - Anemia ... disease - Vitamin B12 ... and/or folate deficiency ... Underproduction #Algorithm #hematology
Myelodysplastic Syndrome (MD) - Diagnosis and Management Summary
myelo (marrow) -dys- (abnormal) -plastic (shape) = funny-shaped cells
Myelodysplastic Syndrome ... cytopenias (usually anemia ... transformation to acute leukemia ... only curative treatment ... #hematology #oncology
Aplastic Anemia - Overview

Who?
• M = F
• 3 peaks:	1) Childhood	2) 15-25 years	3) >60 years

What?
• Aplastic anemia
, GATA2 deficiency ... , CTLA4 deficiency ... virus (EBV) • Leukemia ... Treatment: ... #oncology #hematology
Causes of Anemia with elevated Mean Corpuscular Volume (MCV) - Differential Diagnosis Algorithm
Normal Blood Smear
 •
• Dietary Deficiency ... - Low Serum B12 ... Myelodysplastic Syndromes ... and Folate Deficiency ... Algorithm #Causes #Hematology
Diagnostic Framework for Anemia (Morphological Approach - MCV)
Low MCV - <80fL - "Microcytic"
 • Iron deficiency
Megaloblastic: Vitamin B12 ... deficiency, Folate ... deficiency • ... Myelodysplastic syndrome ... diagnosis #causes #hematology