10 results
Mixing Study
 • Clotting tests can be abnormal due to either a clotting factor deficiency, or
activity (e.g. antibody ... . 1:1 Mix of Patient's ... PT and/or aPTT) ... Study #diagnosis #hematology ... pathophysiology #hematology
Antinuclear Antibody Testing - Nuclear and Cytoplasmic Patterns
Nuclear Patterns:
 • Homogeneous pattern: 
   -
Antinuclear Antibody ... SLE, SjS, CTD-ILD ... phenomenon - EJ, Jo-1, ... #differential # ... diagnosis #rheumatology
Approach to Thrombotic Microangiopathy (TMA) - Differential Diagnosis and Management Algorithm

Suspected TMA: Unexplained thrombocytopenia + MAHA
antiglobulin test, PT/aPTT ... schistocytes > 1% ... hemosiderin • PT/aPTT ... normal • DAT ... Management #Algorithm #hematology
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
Causes of Abnormal ... FVIII antibody ... Jcortesizaguirr #Abnormal ... Causes #diagnosis #differential ... #hematology #coagulation
Platelet disorders and Aggregometry
Glanzmann Thrombasthenia
 • Defective aggregation to all agonists except ristocetin
 • Normal platelet,
platelet, PT, PTT ... similar aggregation pattern ... cytometry — GP Ilb ... either severe Type 1 ... Platelet #disorders #hematology
Differential Diagnosis for a Prolonged PT and aPTT
If the PT and the aPTT are both prolonged,
Differential Diagnosis ... Causes include : 1. ... amyloidosis #Abnormal ... Causes #diagnosis #differential ... #hematology #coagulation
Bleeding and Bruising - Disorders of Hemostasis - Differential Diagnosis Framework

== Quantitative or Qualitative defect in
PT/NORMAL PTT: ... PT/ABNORMAL PTT ... PT/NORMAL PTT: ... PT/ABNORMAL PTT ... #Diagnosis #Hematology
Antinuclear Antibody Testing Cytoplasmic Patterns
Reticular/AMA: 
 • PBC, SSc, PBC/SSc OS, PBC/SjS OS
 • AMA
Speckled:
 •
Antinuclear Antibody ... SLE, SjS, CTD-ILD ... phenomenon • EJ, Jo-1, ... #differential # ... diagnosis #rheumatology
TTP - Laboratory Evaluation for Thrombotic Thrombocytopenic Purpura

Activity of von Willebrand factor-cleaving protease activity - A
performed PT, PTT ... levels - Usually normal ... products or D-dimer - Normal ... WBC count and differential ... Diagnosis #Workup #Hematology
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
permanent alopecia Differential ... Non-autoimmune rheumatologic ... • Acute lupus pneumonitis ... • ANA titers > 1: ... Ro/La, anti-Jo-1,