8 results
Causes of Thrombocytosis - Differential Diagnosis
Secondary Thrombocytosis (a.k.a Reactive Thrombocytosis):
 • Acute infection
 • Solid organ
Secondary Thrombocytosis ... malignancies • Anemia ... specifically: iron deficiency ... Myelodysplastic syndrome ... #Causes #hematology
Leukemias Overview: ALL, CML, AML, APML, CLL

Acute leukemias > 20% blasts in the peripheral blood smear
phases of maturation ... develop leukostasis syndrome ... - infiltrates (anemia ... • Tumor lysis syndrome ... #Leukemia #Hematology
Approach to Thrombocytosis - Elevated Platelet Count - Differential Diagnosis Algorithm

Peripheral Smear concerning for malignancy?
→ Refer to hematology ... for workup, including ... anemia, Rebound ... Kawasaki, Nephrotic syndrome ... #Algorithm #hematology
Chronic Lymphocytic Leukemia - Summary

Cancer affecting lymphocytes/Mature B cell neoplasm
 • Lymphocytes accumulate in large numbers
• Neutropenia, anemia ... • Richter’s Syndrome ... leukemia • Sezary syndrome ... #workup #oncology ... #hematology
Myelodysplastic Syndromes (MDS)

What?
Myelodysplastic syndromes are a group of disorders caused by blood cells that are poorly
Myelodysplastic Syndromes ... Myelodysplastic syndromes ... formed or don’t work ... DDX: Rule Out Secondary ... #diagnosis #hematology
Idiopathic CD4 Lymphopenia (ICL) / Lymphocytopenia 

DIAGNOSTIC CRITERIA FOR ICL
 • Persistent CD4 T-cell lymphopenia
 •
underlying primary or secondary ... mL or 20% total lymphocyte ... chemotherapy) • Genetic syndromes ... variable immune deficiency ... #hematology #Differential
Common Variable Immunodeficiency (CVID)

What?
CVID: Immunodeficiency disorder with hypogammaglobulinemia -> increased infection risk secondary to impaired B-cell
infection risk secondary ... Granulomatous lymphocytic ... : • Nephrotic syndrome ... (Epstein-Barr syndrome ... hypogammaglobulinemia #immunology #hematology
Causes of Neutropenia - Differential Diagnosis
Neonate:
 - Infection - by far the most common cause
 -
neutropenia, Kostmann syndrome ... Chediak-Higashi syndrome ... Megaloblastic anemia-rare ... - Copper deficiency-rare ... #causes #hematology