6360abefb0d6371309cc9857
Abstract
Triple-seropositive disease (TPD), defined here as
concurrent MPO-ANCA, PR3-ANCA, and anti-GBM antibodies, is rare and typically
severe. We report a 71-year-old Jehovah’s Witness who presented with advanced
kidney failure and a large pericardial effusion. Serology confirmed triple
positivity, but kidney biopsy tissue was markedly limited. Plasma exchange
(PLEX) was declined on religious grounds. Induction was therefore undertaken
with high-dose glucocorticoids and rituximab, coordinated with hemodialysis and
bloodless-medicine strategies. Despite therapy, she remained dialysis
dependent. This case highlights pragmatic, preference-concordant management in
the setting of sparse tissue, triple seropositivity, and refusal of PLEX.
Keywords: Triple-seropositive disease; Plasma
exchange; Pericardial effusion; High-dose glucocorticoids
Introduction
Rapidly progressive glomerulonephritis (RPGN) most commonly arises from ANCA-associated vasculitis (AAV) or anti–glomerular basement membrane (anti-GBM) disease. The better-described “double-positive” overlap (ANCA plus anti-GBM) has emerged as a true hybrid phenotype, characterized by severe initial kidney injury and pulmonary risk but an AAV-like propensity to relapse, prompting recommendations for both anti-GBM–intensity induction and AAV-style maintenance. In contrast, triple-positive disease (TPD) remains exceptionally rare, with only a small number of cases reported across renal-limited and pulmonary–renal presentations. No guideline addresses TPD explicitly, and current management is extrapolated from double-positive overlap, AAV, and anti-GBM disease. We present this case to illustrate the challenges of TPD, particularly in the setting of significant diagnostic and treatment limitations.
Case Report
A 71-year-old Jehovah’s Witness woman with a history
of hypertension presented with 10 days of malaise, anorexia, and intermittent
nausea. In the few days preceding admission, she developed vomiting and noted
“foamy” urine. Physical examination was largely unremarkable, notable only for
mild lower-extremity pitting edema and muffled heart sounds. She had not
followed her primary care physician for routine preventive medical care and was
not taking any medications. The patient reported a 10-year history of weekend
employment as a cleaning worker with exposure to cleaning chemicals; this
employment ended two years prior to presentation. She denied any occupational
or environmental exposure to silica dust and reported no participation in
agricultural or farming activities. Her sister had died from complications of
systemic lupus erythematosus in her 20s. Her last known laboratory studies
(obtained during an emergency department visit) six years earlier showed a
creatinine of 0.81 mg/dL and BUN of 13 mg/dL. (Table 1) shows the laboratory
parameters at admission. (Table 2) shows the results of urinalysis at admission
and (Table 3) shows the results of autoantibody profile.
Table 1: Lab Results with Reference Ranges
|
Component |
Result |
Reference Range |
|
WBC |
3.43 ×10³/µL |
3.6 – 11.2 ×10³/µL |
|
Lymphocytes |
16% |
~20 – 40% |
|
Eosinophils |
0.30% |
~0 – 5% |
|
Hemoglobin |
10.4 g/dL |
12.0 – 16.5 g/dL |
|
Platelets |
291 |
150 - 400 K/CMM |
|
BUN |
96.3 mg/dL (6 yrs ago: 13) |
8.0 – 23.0 mg/dL |
|
Creatinine |
6.96 mg/dL (6 yrs ago: 0.81) |
0.44 – 1.03 mg/dL |
|
eGFR |
6 mL/min/1.73 m² |
≥ 60 mL/min/1.73 m² |
|
Calcium |
8.3 mg/dL |
8.9 – 10.3 mg/dL |
|
Phosphorus |
5.2 mg/dL |
2.5 – 4.5 mg/dL |
|
Albumin |
3.0 g/dL |
3.5 – 5.2 g/dL |
|
ESR |
87 mm/hr |
<30 mm/hr |
|
CRP |
75 mg/L |
<5 mg/L |
Table
2:
Urinalysis Results
|
Component |
Result |
Reference Range |
|
Color |
Colorless |
Yellow, Straw |
|
Clarity |
Cloudy |
Clear |
|
Specific Gravity |
1.012 |
1.005 - 1.030 |
|
pH |
5 |
5.0 - 8.0 |
|
Leukocytes |
3+ |
Negative |
|
Nitrite |
Negative |
Negative |
|
Protein |
1+ |
Negative, Trace |
|
Blood |
3+ |
Negative |
|
WBC |
51-100 /HPF |
None Seen, 1-4 /HPF |
|
RBC |
51-100 /HPF |
None Seen, 1-4 /HPF |
|
Hyaline Casts |
None Seen |
None Seen, 0-2 /LPF |
|
Granular Casts |
Present |
None Seen |
|
CRP |
75 mg/L |
<5 mg/L |
Table
3:
Results of autoimmune antibody profile
|
Test |
Result |
Value |
|
ANA by ELISA |
Positive |
132 |
|
MPO-ANCA |
Positive |
>8 (Ref <0.4 negative) |
|
PR3-ANCA |
Positive |
Qualitative only (no titer reported) |
|
SS-A (RO) Antibody |
Positive |
132 |
|
GBM Antibody |
Positive |
3.6 Positive >=1.0 |
|
Nitrite |
Negative |
Negative |
|
Protein |
1+ |
Negative, Trace |
|
Blood |
3+ |
Negative |
|
WBC |
51-100 /HPF |
None Seen, 1-4 /HPF |
|
RBC |
51-100 /HPF |
None Seen, 1-4 /HPF |
|
Hyaline Casts |
None Seen |
None Seen, 0-2 /LPF |
|
Granular Casts |
Present |
None Seen |
|
CRP |
75 mg/L |
<5 mg/L |
She
was given a bicarbonate infusion. Her urinary output in the first 24 hours was
350 mL. A chest x-ray showed pericardial effusion, and an echocardiogram
revealed a moderate to large circumferential pericardial effusion which was
approximately 3 cm in depth. It also showed early diastolic collapse of the
right atrium, suggesting cardiac tamponade.
Plasma
exchange was offered, but she declined it on religious grounds. Hence, she
received IV methylprednisolone 250 mg daily for 3 days and then transitioned to
Prednisone 60 mg/day with a taper over 3 months.
A
tunnelled haemodialysis catheter was placed. Haemodialysis was initiated, and
was performed daily for three sessions, then transitioned to a thrice-weekly
schedule. A percutaneous kidney biopsy was performed, but the tissue was
limited. On light microscopy, only 2 glomeruli are seen, 1 of which was
globally sclerotic. The single open
glomerulus showed no significant mesangial matrix expansion or
hypercellularity. The glomerular
basement membranes did not appear thickened, and no deposits or double contouring
is seen. No crescents, fibrinoid
necrosis, segmental sclerosis, or thrombi were observed. Mild arteriosclerosis
and red blood cell casts within some distal tubules were seen. Tissue for
immunofluorescence studies contained no glomeruli. Due to the limited nature of
the specimen, electron microscopy was not performed. Repeat kidney biopsy was
offered, but she declined.
After
a negative TB screening and undetectable HBV DNA, she was given rituximab in a
dose of 375 mg/m² weekly for 4 weeks. She also received Iron Sucrose infusions
for 4 doses and subcutaneous darbepoetin for anemia,
trimethoprim-sulfamethoxazole for Pneumocystis jirovecii prophylaxis, and a
proton-pump inhibitor for gastrointestinal reflux. For the large pericardial
effusion, no pericardiocentesis was required. A repeat Transthoracic
echocardiogram showed a persistent large effusion without tamponade. Her kidney
function did not improve with Rituximab and prednisone, and she remained
dialysis dependent.
Discussion
Triple-positive
disease (MPO-ANCA, PR3-ANCA, and anti-GBM) sits at the extreme end of the
pathogenic spectrum, where profound loss of immune tolerance culminates in
severe systemic injury, predominantly renal and pulmonary. Yet we still do not
fully understand which mechanisms are truly driving the process. Most of our
knowledge comes from larger double-positive cohorts and only a handful of
triple-positive cases. Across the literature, double-positive patients (DPP)
ANCA + anti-GBM disease emerge as a distinct hybrid phenotype rather than a
simple variant of either condition alone1-3.
The retrospective analysis of large multi-centre European cohort showed that
these patients behave like anti-GBM early, with rapid kidney injury and
pulmonary risk, yet relapse later like AAV, meaning that optimal care requires
anti-GBM-style urgent induction and long-term AAV-type maintenance.1 Another
cohort reinforces this picture: in the Chinese retrospective study,
double-positive patients were typically older, had worse renal function at
diagnosis than single positive MPO-AAV, and demonstrated broader multiorgan
involvement especially cardiac with clearly poorer renal and patient survival
compared with MPO-AAV. Prognosis was tightly linked to kidney function. 2 A
systematic review of DPP found that most patients present with acute kidney
failure (~92%), about half with alveolar haemorrhage, and nearly one-third with
ENT or joint disease, with MPO-ANCA overwhelmingly dominating over PR3-ANCA and
true triple-positivity remaining rare at 2.9%. 3 When all three sources are
considered together, they paint a consistent narrative: double-positive disease
is severe at presentation, systemically active, recovery-capable yet
relapse-prone, and biologically aligned to both AAV and anti-GBM, demanding
treatment that is both aggressive up front and vigilant long-term.
Triple-positive
disease case reports including our Jehovah witness case frame it as an extreme,
rare variant on the same spectrum. Across these cases, a recognizable
therapeutic pattern emerges early induction with high-dose corticosteroids,
cyclophosphamide, and plasma exchange appears to be the central strategy, yet
outcomes diverge widely depending on age, comorbid burden, and biopsy phenotype
(Table 4). Overall, better prognosis
correlates with younger age, lower chronicity on biopsy, and timely therapy,
whereas delayed presentation, comorbid disease, and complete glomerular
destruction predict irreversible renal failure or death4-10.
Table
4:
Shows the details of TPD patients reported in the literature
|
Ref# |
Year |
Age |
Race |
Clinical Phenotype |
Histology |
Treatment |
Outcome |
|
4 |
2025 |
29 |
Unknown |
Pulmonary– renal |
Extra capillary proliferation
with fibro cellular and cellular crescents. |
Methylprednisolone, Cyclophosphamide,
Plasma exchange |
Renal and pulmonary improvement |
|
|
|||||||
|
Maintenance treatment:
Azathioprine |
|||||||
|
|
|||||||
|
5 |
2022 |
62 |
Caucasian |
Renal Limited |
Immunofluorescent staining showed
linear deposition of IgG anti-GBM antibody |
Steroid, Cyclophosphamide, Plasma
exchange, |
|
|
Dialysis dependent. |
|||||||
|
6 |
2017 |
68 |
Unknown |
Renal Limited |
Pauci-immune type crescentic
glomerulonephritis Global and segmental sclerosis, cellular and fibrocellular
crescents. Prominent interstitial fibrosis, tubular atrophy, and infiltration
of inflammatory cells. |
IV Prednisolone, |
Renal function improved. |
|
Cyclophosphamide, Plasma exchange |
|||||||
|
|
|||||||
|
7 |
2021 |
54 |
Unknown |
Renal Limited |
Pauci-immune crescentic
glomerulonephritis. |
Methylprednisolone, |
Renal function improved. |
|
Global sclerosis with crescents |
Cyclophosphamide, Plasma exchange |
||||||
|
|
|
||||||
|
8 |
2023 |
79 |
Unknown |
Renal Limited |
Autopsy kidney biopsy
Pauci-immune glomerulonephritis, fibrocellular crescents endocapillary
hypercellularity, mesangial cell proliferation, tubular atrophy. |
Methylprednisolone,
Cyclophosphamide, Plasma exchange. |
Fatal |
|
9 |
2021 |
80 |
Caucasian |
Pulmonary– renal |
Linear deposition of IgG along
the GBM Cellular crescents in 57% glomeruli with focal fibrinoid necrosis and
mildly interstitial fibrosis, inflammatory infiltrate. |
Methylprednisolone,
Cyclophosphamide, Plasma exchange. |
Respiratory symptoms improved. |
|
|
|||||||
|
Renal function did not improve. |
|||||||
|
|
|||||||
|
Dialysis dependent. |
|||||||
|
|
|||||||
|
10 |
2020 |
51 |
Caucasian |
Renal Limited |
Mesangial positivity for IgA, C3,
lambda, and IgG4 positive plasma cell.
Cellular crescents, segmental necrosis, lymphoplasmacytic infiltrate. |
Methylprednisolone,
Cyclophosphamide, Plasma exchange. |
|
|
Renal function improved. |
The
biopsy spectrum across triple and double positive, linear IgG crescents,
pauci-immune patterns without deposition, and IgG4- or IgA-rich infiltrates
reinforces that the same serologic triad can sit atop different histologic and
cellular pathways.1-10 More broadly, work in crescentic GN shows that crescents
themselves represent a common structural response to diverse injuries,
involving not only immune complexes but also intrinsic parietal epithelial cell
proliferation and fibrogenic signaling11.
Pathophysiologically,
these cases together support the idea that triple-positive disease is not three
separate illnesses layered by chance, but a manifestation of profound immune
tolerance breakdown. ANCA-associated vasculitis reflects loss of B- and T-cell
tolerance to MPO and PR3, with neutrophil activation, NET formation, complement
engagement, and endothelial injury driving capillarity’s and necrotizing
glomerulitis. Anti-GBM disease adds antibodies directed against cryptic GBM
epitopes in the glomerular and alveolar basement membranes. Intermolecular
epitope spreading offers a plausible bridge ANCA-mediated injury could expose
GBM antigens and trigger anti-GBM antibodies, or primary anti-GBM damage could
unmask neutrophil antigens and provoke MPO/PR3 ANCA but in any given
triple-positive patient we have no reliable way to know which process came
first or which is dominant12,13.
These
mechanistic uncertainties flow directly into therapeutic uncertainty.
Double-positive series tell us that overlap disease demands both anti-GBM
intensity induction and AAV-style maintenance, but they offer almost no
triple-positive–specific guidance. The handful of published triple-positive
cases and our Jehovah’s Witness patient show that even with such aggressive
regimens, many patients remain dialysis-dependent or die. Ultimately,
triple-positive disease, and crescentic GN more broadly, expose the limits of
our framework: we deploy powerful, largely non-specific immunosuppression and
extracorporeal therapies against a process whose exact drivers, sequence, and
points of reversibility remain only partly mapped, and we lack reliable tools
to identify the dominant pathway in an individual patient. Until more cases are
aggregated and mechanistic, work catches up with clinical observation;
management will remain highly individualized and largely extrapolated from
existing overlap data from DPP.
Conclusion
This
case underscores that triple-seropositive disease (TPD) is not only
biologically complex but also clinically challenging. Beyond the striking
serology, our patient’s care was shaped by late presentation, sparse tissue,
dialysis-level kidney failure, and the patient’s refusal of PLEX. Together with
the small existing case series, our experience suggests that once chronic,
structurally fixed injury is established, even well-constructed regimens may be
unable to restore kidney function. For clinicians, this highlights the
importance of early recognition of possible overlap disease, thoughtful use of
limited biopsy material, and proactive involvement of bloodless-medicine and
ethics teams when standard therapies conflict with religious beliefs. For the
field, it emphasizes the need for collaborative registries and mechanistic
studies focused specifically on triple-seropositive patients, so that future
management can be guided by more than extrapolation and individual case
reports.
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