16 results
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
Diagnosis and Management ... antiglobulin test, PT/aPTT ... schistocytes > 1% ... hemosiderin • PT/aPTT ... #Algorithm #hematology
Mixing Study
 • Clotting tests can be abnormal due to either a clotting factor deficiency, or
activity (e.g. antibody ... PT and/or aPTT) ... Mixing #Study #diagnosis ... #hematology #pathophysiology ... #hematology #laboratory
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
) 1. ... FVIII antibody ... Prolonged #Causes #diagnosis ... #differential # ... hematology #coagulation
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
with a nodular pattern ... . 1. ... Hypersensitivity pneumonitis ... #Clinical #Diagnosis ... NodularPattern #Differential
Platelet disorders and Aggregometry
Glanzmann Thrombasthenia
 • Defective aggregation to all agonists except ristocetin
 • Normal platelet,
platelet, PT, PTT ... cytometry — GP Ilb ... either severe Type 1 ... Platelet #disorders #hematology ... #diagnosis #Aggregometry
Differential Diagnosis for a Prolonged PT and aPTT
If the PT and the aPTT are both prolonged,
Differential Diagnosis ... Causes include : 1. ... Prolonged #Causes #diagnosis ... #differential # ... hematology #coagulation
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
gangrenosum • IBD ... Antiphospholipid-antibody ... Sarcoidosis #dermatology ... #skin #rashes #differential ... #diagnosis #rheumatology
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
activity is the diagnostic ... available for rapid diagnosis ... performed PT, PTT ... WBC count and differential ... #Workup #Hematology