32 results
Causes of Hypocomplementemia - CHAMPS Mnemonic
C - Cryoglobulinemia (85%), C3 glomerulopathy, cirrhosis
H - Heavy Chain deposition
Causes of Hypocomplementemia ... angioedema A - Atypical ... antiphospholipid syndrome ... @AnnKumfer #Hypocomplementemia ... #Low #Complement
Pulmonary Renal Syndromes and Mimics - Differential Diagnosis Framework
Diffuse alveolar hemorrhage + rapidly progressive glomerulonephritis
90%:
 -
Pulmonary Renal Syndromes ... anti-GBM) 10%: - Low Complement ... Levels: SLE, Cryoglobulinemic ... Vasculitis - Normal Complement ... - MAHA: HUS, atypical
Atypical HUS - Hemolytic Uremic Syndrome
Unlike typical HUS, which is shigatoxin mediated, aHUS is not typically
Uremic Syndrome ... autoimmune like SLE ... It is complement ... with Eculizumab (complement ... @JustinMD19 #Atypical
Differential diagnosis of schistocytes / fragmentation hemolysis:
 • Thrombotic microangiopathies (TMA)
    - TTP
hemolytic-uremic syndrome ... (ST-HUS) - Complement-mediated ... formerly known as atypical ... anemia" • HELLP syndrome
Antinuclear antibodies and Systemic lupus
Anti-dsDNA	60-80%	Association with disease activity (when with Farr assay) and lupus nephritis. Can
Anti-Ribo-P 5-15% If SLE ... overlap syndromes ... higly specific for SLE ... patients with typical ... SLE.
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
often involved • Hypocomplementemic ... Urticaria and hypocomplementemia ... • Cogan Syndrome ... against MPO • Complement ... vasculitis, and SLE
Thrombotic Microangiopathy - TMAs
1. Not all MAHAs are due to TMAs but (almost) all TMAs cause
is due to TTP, compliment-mediated ... TTP (atypical HUS ... catastrophic APS, SRC, SLE
Causes of Thrombocytopenia - Differential Diagnosis Algorithm
 
Decreased Megakaryopoiesis
 • Aplastic Anemia
 • Toxic Damage (e.g.
Differential Diagnosis Algorithm ... Autoimmune • ITP • SLE ... Non-lmmune: • HELLP Syndrome ... Differential #Diagnosis #Algorithm
Cryoglobulinemia Summary

Cryoglobulins:
 • Cryoglobulins are Igs in the serum that precipitate in vitro at temperatures below
Hyperviscosity Syndrome ... diseases: - 10% SLE ... 20% Sjögren's syndrome ... • Low serum C4 complement ... erythematosus (SLE
Eosinophilia - Differential Diagnosis Algorithm
Idiopathic Eosinophilia
Primary Eosinophilia:
 • Primary hypereosinophilic syndrome
 • Eosinophilic Leukemia
 • MPN/MDS
Differential Diagnosis Algorithm ... hypereosinophilic syndrome ... Hyper-lgE (Job) syndrome ... , Sarcoidosis, SLE ... Differential #Diagnosis #Algorithm