Renal outcomes in mixed proliferative and membranous lupus nephritis (Class III/IV + V): A long-term observational study.
OBJECTIVE
In this study, we aimed to assess the effect of combination of proliferative and membranous lesions (Class III + V or IV + V) on renal outcomes as an independent category distinct from Class III and IV.


METHODS
We retrospectively analyzed 103 Japanese patients (14 male and 89 female) with Class III/IV LN, with or without Class V, who underwent renal biopsy and were treated at our institution. Renal endpoint was defined as doubling of serum creatinine or end-stage renal disease (ESRD).


RESULTS
The number of patients in each group was as follows: pure Class III/IV, 81 patients and mixed Class III/IV + V, 22 patients. During a median follow-up period of 125.0 months, 10 patients developed renal endpoint: five had Class III/IV LN and five had a combination of Class III/IV + V. Kaplan-Meier analyses demonstrated that patients with mixed Class III/IV + V LN had significantly poorer renal outcomes than patients with Class III/IV LN. Multivariate Cox regression analyses identified serum creatinine, active and chronic lesions (A/C), and mixed Class III/IV + V) as independent risk factors for poor renal outcomes.


CONCLUSIONS
This study demonstrated a combination of proliferative and membranous LN (ISN/RPS Class III/IV + V) predicts poor renal outcomes.
a Department of Medicine and Clinical Science , Gunma University Graduate School of Medicine , Gunma , Japan.
Hidekazu
H
Ikeuchi
a Department of Medicine and Clinical Science , Gunma University Graduate School of Medicine , Gunma , Japan.
Keiju
K
Hiromura
a Department of Medicine and Clinical Science , Gunma University Graduate School of Medicine , Gunma , Japan.
Ken
K
Kayakabe
a Department of Medicine and Clinical Science , Gunma University Graduate School of Medicine , Gunma , Japan.
Kadiombo Anastasie
KA
Tshilela
a Department of Medicine and Clinical Science , Gunma University Graduate School of Medicine , Gunma , Japan.
Kazuhiko
K
Uchiyama
a Department of Medicine and Clinical Science , Gunma University Graduate School of Medicine , Gunma , Japan.
Hiroko
H
Hamatani
a Department of Medicine and Clinical Science , Gunma University Graduate School of Medicine , Gunma , Japan.
Toru
T
Sakairi
a Department of Medicine and Clinical Science , Gunma University Graduate School of Medicine , Gunma , Japan.
Yoriaki
Y
Kaneko
a Department of Medicine and Clinical Science , Gunma University Graduate School of Medicine , Gunma , Japan.
Akito
A
Maeshima
a Department of Medicine and Clinical Science , Gunma University Graduate School of Medicine , Gunma , Japan.
Yoshihisa
Y
Nojima
D000328:Adult; D005260:Female; D006801:Humans; D007668:Kidney / Q000473:pathology*; D008181:Lupus Nephritis / Q000473:pathology*; D008297:Male; D008875:Middle Aged
ISN/RPS classification; Lupus nephritis; Renal outcome; Systemic lupus erythematosus