SLE Flashcards
What 2 populations where SLE is more often associated with severe nephritis?
- CHILDREN
- MALES
What are the 2 entry criteria for renal involvement in LN?
- PROTEINURIA
>500mg/dL/day or 3+ - CELLULAR URINARY CASTS
What class is Minimal mesangial LN?
CLASS I
What class is Mesangial proliferative LN?
CLASS 2
What class is Focal LN?
CLASS 3
What class is Diffuse LN?
CLASS 4
What class is Membranous LN?
CLASS 5
What class is advanced sclerosing LN?
CLASS 6
What LN classes has active, chronic, active & chronic lesions?
CLASS 3 & 4
What Class of LN is characterized by:
LM - normal-appearing glomeruli
IF/EM - mesangial immune deposits
CLASS 1
What Class of LN has
IF/EM - purely mesangial hypercellularity, with mesangial immune deposits
CLASS 2
What class is defined as focal segmental and/or global endocapillary and/or extracapillary glomerulonephritis affecting < 50% of the total glomeruli sampled?
CLASS 3
What class is defined as focal segmental and/or global endocapillary and/or extracapillary glomerulonephritis affecting > 50% of the total glomeruli sampled?
CLASS 4
Class 4 lesions may have similar features with what type of GN?
MPGN
What Class of LN is defined by regular subepithelial immune deposits producing a membranous pattern with the coexistence of mesangial immune deposits and mesangial hypercellularity?
CLASS 5
What differentiates Primary MN vs Membranous LN
Primary MN - SUBEPITHELIAL IMMUNE COMPLEX DEPOSITS only
Membranous LN -
SUBEPITHELIAL IMMUNE COMPLEX DEPOSITS + MESANGIAL IMMUNE DEPOSITS & HYPERCELLULARITY
Wwhat Class of LN is characterized by > 90% of the glomeruli sclerotic and no residual activity?
CLASS 6
What class is characterized by mild global mesangial hypercellularity?
CLASS 2 LN
What Class is characterized by focal segmental endocapillary proloferation?
Class 3
What class is characterizwd by global endocapillary proliferation with infiltrating neutrophils & segmental wore loop deposits?
CLASS 4
What staining on IF is highly suggestive of LN?
“FULL HOUSE” STAINING
What is meant by “FULL HOUSE” staining on IF?
Presence of:
1. ALL 3 Igs: IgG, IgA, IgM
2. 2 COMPLEMENTS: C3, C1q
Describe the deposits seen on EM in LN?
• electron-dense
• granular
• “fingerprint” substructure
• tubuloreticular inclusions
What are the intracellular branching tubular structures measuring 24 nm in diameter located within dilated cisternae of the endoplasmic reticulum of glomerular and vascular endothelial cells, commonly observed in SLE biopsies?
TRIs
TRIs are present in what 3 disease conditions?
- SLE
- HIV
- VIRAL INFECTIONS
What are the 6 histologic features for Activity index?
- Endocapillary hypercellularity
- Glomerular neutrophil infiltration/Karyorrhexis
- Interstitial inflammation
- Wire loop lesions
- Fibrinoid necrosis
- Fibrocelullar/cellular crescents
What is the maximum activity incex score?
24
What is the maximum chronicity index score?
12
What are the 2 severe lesions and assigned double weight in activity index score?
- Fibrinoid necrosis
- Crescents