Pulmonary Renal Syndorme

Pulmonary Renal
Syndromes
A Rheumatologic Emergency
Farhan Tahir MD

Agenda
 Pulmonary Renal Syndrome
 A Rheumatologic Emergency
 Classification
 Characteristic Profile of Diseases
 Mortality and Prognosis
 Interesting Cases and Differential Diagnosis
 Review of Clinical Management
 Summary

A Rheumatologic Emergency
 The term Pulmonary Renal Syndrome refers to the combination
of diffuse alveolar hemorrhage and rapidly progressive
glomerulonephritis
 There is a broad list of etiologies which can cause this syndrome
and significant number of patients will present with rapid clinical
deterioration and require admission to the intensive care unit
 Presentation is variable and could be related to exacerbation of
the disease activity or to infectious complications secondary to
severe immunosuppressive treatment
 Pulmonary–renal syndromes represent a major challenge since the
outcome is based on early and accurate diagnosis and aggressive
treatment and mortality can reach 25–50%

Presentation and Diagnostic Workup
 Fever, cough and dyspnea, often acute or sub acute( <1wk)
 Hemoptysis may be absent in 1/3 of patients
 When hemoptysis is present, one must exclude infection, left heart
failure, severe mitral stenosis, pulmonary embolism and drug
exposure (PTU and Cocaine) as possible etiologies so thorough
history is extremely important
 CXR and Chest CT show diffuse bilateral infiltrates often
impossible to differentiate form infection or acute pulmonary
edema
 Early bronchoscopy is most helpful and serves two purpose,
document hemorrhage and exclude airway lesions as source of
bleeding and BAL fluid cultures exclude infection

DLCO, Exhaled Nitric oxide and Biopsy
 TBBX specimen is small and unlikely to help establish diagnosis
 VATS or open lung biopsy although invasive is more definitive
 PFT testing particularly DLCO is helpful but impractical
modalities for sick patients
 Increased intra alveolar hemoglobin binds NO and levels of NO
are decreased in exhaled breath. Decreased exhaled Nitric oxide is
a promising bedside test but not widely available
 Patients presenting with pulmonary renal syndrome, renal biopsy
with IF has higher yield in identifying underlying cause

Basis of Classification
 A variety of mechanisms are implicated in the pathogenesis of this
syndrome i.e. antibody mediated diseases, immune complex
mediated and others i.e. drugs
 Underlying pulmonary pathology is small-vessel vasculitis involving
arterioles, venules and, frequently, alveolar capillaries
 Underlying renal pathology is a form of focal proliferative
glomerulonephritis
 Immunofluorescence helps to distinguish between antibody
mediated and immune complex mediated diseases

Classification Based On Vessels Size
Arch Bronconeumol. 2008;44(8):428-36

Immune Complex Deposition

Pattern of Immunofluorescence

Antibody mediated Vs
Immune Complex Disease

Renal Glomerulus with anti-GBM
Disease
Linear staining of the GBM by direct immunofluorescence microscopy
using an antibody specific for immunoglobulin G (Ig G)

Granular Immunofluorescence in SLE
Renal and Lung Immunofluorescence microscopy
Arch Pathol Lab Med—Vol 125, April 2001

Pauci-immune Vasculitis

Crescentic Glomerulonephritis in
Pauci immune Vasculitis
WG segmental fibrinoid
necrosis and cellular crescent
MPA: cellular crescent at the top
of the image and a small irregular
(red) focus of fibrinoid necrosis

Direct immunofluorescence of ANCA
Crescentic GN
Irregular staining of a large crescent by IF microscopy using an
antibody specific for fibrin

Pulmonary Renal Syndromes
Critical Care Vol 11 No 3 Papiris et al.

Relative Frequencies of Vasculitis
Critical Care Vol 11 No 3 Papiris et al.

CLEVELAND CLINIC JOURNAL OF MEDICINE VOLUME 75 • NUMBER 4 APRIL 2008

Reaching Diagnosis in Challenging
Cases
Hemoptysis and renal failure is not equivalent to
pulmonary renal syndrome

Evaluating PAH and Hematuria
Are you dealing with a systemic vasculitis Y/N
Is there evidence of oral and nasal inflammation Y/N
Any history of Asthma, eosinophila or paranasal sinus disease Y/N
Is there palpable purpra, arthritis or/and abdominal pain Y/N
Does patient has bilateral pulmonary infiltrates + bronchoscopy
with hemorrhagic BAL
Y/N
Oral and genital ulceration, uveitis and skin lesions Y/N
Is there history of D-penicillamine or PTU use or BMT Y/N
Risk factors for pneumonia with renal failure, in an
Y/N
immunosuppressed host (bacterial/viral or PCP)
Is there new congestive heart failure with prior hx renal disease Y/N

Evaluating PAH and Hematuria
Any evidence of MAHA (HUS/TTP): HPT, LDH, DAT,
Peripheral smear, Low PLT
Y/N
Possibility of a bleeding diathesis: DIC , Coags, coumadin Y/N
Is there nephrotic proteinuria  Pulmonary Embolism Y/N
Serologies
Lupus: ANA, ENA, DsDNA, C3,C4
Pauci-Immune: ANCA, Pr3, MPO, AGBM
Immune complex Vasculitis: Cryo, RF, viral hepatitis
Antiphospholipid syndrome: DRVVT,CAB, B2GP1
Y/N
Tissue biopsy showing necrosis, vasculitis, granulomatous
inflammation

Case-1
Age/Sex 20 Male
Prior Hx Neurofibromatosis
Presentation Fevers, Respiratory distress, Hemoptysis
Laboratory Wbc 15, hb 8, plt 395, creat 0.8, Ur: rbc5, no cast, pr30mg
COAGS Normal ptt, inr, hpt, ldh
Chest X-ray Pulmonary edema, pneumonia, pl eff
Chest CT Bilateral opacities multilobar infection, ARDS. No PE
BAL/Bronch sub segmental blood clots, no fresh blood
Microbiology Legionalla and mycoplasma (neg), BAL : GS, Tb and
fungal negative
ECHO Not done
Immunology Negative NAB, NCAB,CAB. Positive AGBM
Biopsy Not done

Developing Differential Diagnosis
www.medal.org

Differential Diagnosis and Treatment
 Goodpastures’s
disease
 Infection
 Pulse dose steroids x3
 Plasmapheresis
 IV Cytoxan
 Broad spectrum
antibiotics pending
cultures
 IVIG for
hypogammaglobulinemia
 Resulted in favorable
outcome

Case-2
Age/Sex 61 F recent travel to Mexico
Prior Hx Hypertension, Dyslipedemia, Bronchitis
Presentation Acute dyspnea, Fatigue and dry cough
Laboratory Wbc 8.1, hb 9, plt 212, creat 0.9, Ur: rbc 100, no cast, pr
COAGS Normal ptt, inr. (Hpt, LDH, DAT not done)
Chest X-ray Pulm edema/ARDS and/or multifocal pneumonia
Chest CT B/L consolidations and ground glass opacities, No PE
BAL/Bronch Moderate amount of blood
Microbiology Legionnella (neg), BAL : G.S,Tb and fungal negative
Echo LVH, EF 60%
Immunology Pos: P-anca, +MPO, Negative NAB,CAB,AGBM
Biopsy Renal: Moderate to severe arteriolosclerosis; diffuse
tubular injury/focal tubular necrosis

Acute Respiratory Distress in 61 F

Developing Differential Diagnosis

 Microscopic polyangitis
 Churg-Strauss Syndrome
 Pneumonia
Legionalla or PCP,
Nosocomial infection
 Pulse dose steroids x3
 Plasmapheresis
 Hold Cytoxan concern
for infection-pending
cultures
 Broad spectrum
antibiotics
 IV Cytoxan started
after Renal biopsy
 Resulted in favorable
outcome

Case-3
Age/Sex 38/F
Prior Hx Lupus
Presentation SOB, cough with streaks of blood, not frank hemoptysis
Laboratory Wbc 15, Hb 8->6.5 , Plt 155->85, Creat 1.5->2.6,
Pr/cr : 12 g, Ur: 10rbc , smear 1-3 schitiocytes
COAGS Normal PTT , INR, HPT 3, LDH 1415, DAT neg
Chest X-ray Airspace opacities bilaterally, pulmonary edema,
pneumonia and pulmonary hemorrhage
Chest CT Pulmonary hemorrhage or pneumonitis
BAL/Bronch RBC 147,000, WBC 1197
Microbiology BAL(9/9) NEG, BAL 9/20: + Staph; neg AFB, FNG
Echo Globally hypokinetic left ventricle , LVEF 40%
Immunology NAB, DsDNA, Low C3,C4. Neg PR3,MPO,AGBM
Biopsy Membranous focal necrotizing and proliferative GN

Acute Respiratory Distress in 38 F

 Lupus nephritis flare with
pulmonary hemorrhage
 TTP or HUS
 End-stage renal disease with
congestive heart failure
 Legionalla pneumonia
 Nephrotic syndrome with
hypercoagulable state causing
a pulmonary embolus
 Pulse steroids
 Plasmapheresis
 Broad spectrum antibiotics
 IVIG
 Cytoxan
 Rituxan
 IVIG
 Cellcept

 6 lupus, 2 with alveolar hemorrhage and 1 with diffuse alveolar
damage (ARDS), 6/6 active lupus nephritis
 2/3 lung pathology showed bland alveolar wall changes and
immune complex deposits
 Patient with diffuse alveolar damage had invasive aspergillosis
 All 3/6 with pulmonary complications died, 2/6 received pulse
steroids and 1 received cytoxan, No one received plasma exchange

Alveolar and Renal Microangiopathy

Diffuse Alveolar Hemorrhage in SLE
 510 lupus patients - 19 admissions for DAH ( 15 patients)
 14/15 - lupus nephritis, 7/15 on monthly Cytoxan and prednisone
>20mg
 Most episodes treated with pulse dose steroids, 10/19 IV Cytoxan
and 12/19 received plasmapheresis
 53 % overall mortality ( concurrent infection 78%, no infection
20%, prior Cytoxan use 70%, poor prognostic factors Mech.
ventilation and infection
 6/19 - Primary lung infection (HSV and Legionalla, CMV, staph)
 Patients on Cytoxan, 4/6 (had primary infection versus only 2
patients among 8 who were not on Cytoxan)
 3/19 episodes were associated with nosocomial infection (Ecoli,
MRSA and Candida)
Medicine Issue: Volume 76(3), May 1997, pp 192-202 , ZAMORA, MARTIN R. etal

Review of Treatment
 Use of Immunosuppression and Plasma Exchange in PRS -
13 case series and 1 RCT
 Goodpastures's Syndrome
 Small Vessel Vasculitis
 SLE
 Antiphospholipid Syndrome
 Non Immunosuppressive Treatment Modalities in DAH

 71 patients with positive anti GBM antibody disease presented who
with pulmonary hemorrhage and rapidly progressive GN
 Followed in three categories based on renal function at presentation
 Creatinine <5.6mg/dl (<500mgUmol/l), n=19
 Creatinine >5.6mg/dl(>500mgUmol/l) but no dialysis dependent, n=13
 Dialysis dependent with in 72 hours, n=39
 All treated with IS including oral prednisone 1mg/kg( or 60mg
max), Cytoxan (2-3mg/kg/day) for 2-3 months, No Pulse steroids
 Plasma exchange (50ml/kg or 4L)daily for at least 14days
Ann Intern Med. 2001;134:1033-1042.

 20 pts with DAH and confirmed Pauci-immune SVV
 17MPA, 2 WG,1 CSS at UNC
 Treated with pulse dose steroids x3 days, 18/20 received
intravenous cytoxan (0.5g/m2) and plasmapheresis daily until DAH
improved, Mean number of apheresis 6( range 4-9)
 Average time to admission and first exchange was 2 days
 DAH had 100% response rate
 14/20 (70%) had abnormal renal function on admission
 Creatinine (4.5+/- 4.5)at baseline and on discharge 2.4=/- 0.8.

Clinical Parameters in SVV
American Journal of Kidney Diseases, Vol 42, No 6 (December), 2003

RCT: Plasmapheresis and Pulse Steroids

Study Design and Results
 137 patients with ANCA-associated systemic vasculitis, biopsy
confirmed and creatinine >5.8mg/dl were randomized
 One arm received seven plasma exchanges (n=70), second
arm received Pulse steroids (total 3g)
 All received oral prednisone and Cyclophosphamide (details
not clear)
 Renal survival follow up, HR for PE vs IVPS: 0.47(P+0.03)
Duration Pulse steroid Apheresis P value
3Month 49% 69% 0.02
12Month 43% 59% 0.008

Clinical and Serologic Characteristics

Renal Function and Vasculitis
Activity
Adverse Effect Profile in Each Group were comparable

 7 lupus nephritis - 9 episodes DAH
 Serologic evidence of flare and lung biopsy c/w IC deposits
 Treated pulse dose steroids and IV Cytoxan (3/9) and oral
1mg/kg Cytoxan in 6/9 with no plasma exchange
 Mortality 57%, higher mortality associated with infections PCP
and actinobacter, severe anemia at presentation and longer
duration of mechanical ventilation

 22 active lupus pts (SLEDAIs mean 12) who p/w respiratory
distress and hemoptysis and all in the early course of lupus
 Preceding month of presentation there was rise in SLEDAI
and DLCO
 19 received pulse steroids and cytoxan(500mg/m2), 11/22
received plasmapheresis(2-6 times) but no added benefit from
plasmapheresis
 4/22 had concurrent infection
 Mortality 36%
Semin Arthritis Rheum 33:414-421

Seminars in Arthritis andRheurnatism, Vo124, No 2 (October), 1994
 Three patients with biopsy proven acute alveolar capillaritis
 All patient received pulse dose steroids and IV cytoxan and
plasma exchange and 2/3 improved with first treatments
 One patient also received IVIG for recurrent hemorrhage
 Very favorable outcome with plasmapheresis but catious for
infection and procedure related complications which are
reported as high 67% and 12%

 Primary APS can cause DAH and alveolar capillaritis through APL
antibody mediated endothelia cell activation in the absence of
thrombosis
 All 4 patients with DAH treated with pulse dose steroids and IV
monthly cytoxan (0.5 -1 g) for three months, two responded well to
treatment
 2/4 had recurrent pulmonary hemorrhage on switching intravenous
to oral cytoxan and initiated IVIG ( 400mg/kg x5 days)
 Author also suggested empiric antibiotic coverage for infection

 DAH of unclear etiology, negative auto antibodies and absence
of systemic vasculitis or concurrent infection (?IPH)
 Recurrent hemorrhage non responsive to 10 daily treatments of
plasmapheresis and pulse steroids x 3d and transient response to
IV bolus of recombinant factor
 Responded to 4 day course of IVIG( 2g/kg/d) and pulmonary
hemorrhage
 8 days later readmitted for pulmonary embolism, treated with
heparin products without bleeding

 6 patients with DAH treated with intrapulmonary administration
of 50ug rFVIIa via BAL
 DAH was attributed to sarcoidosis, WG, AIDs, AML and post
stem cell transplant
 Complete and sustained hemostasis in 3/6 with single dose and
rest required second doses
 Use of intravenous forms of rFVIIa is approved for hemophilia

Mortality Associated with Pulmonary
Renal Syndrome

Mortality Associated with Pulmonary
Vasculitis

Poor Prognostic Factors
THE AMERICAN JOURNAL OF THE MEDICAL SCIENCES October 2008 Volume 336 Number 4

Poor Prognostic Factors
Variable P value
Mean Age - 60y <0.05
Mean BUN - 53 <0.05
Low Hemoglobin -9.8% =0.05
Elevated WBC count -15.4 =0.05
Fio2 54% <0.05
ICU length of stay – 16days <0.05
Mech. Ventilator use <0.0001
Need for Blood transfusion <0.0002
Secondary infection <0.005
THE AMERICAN JOURNAL OF THE MEDICAL SCIENCES October 2008 Volume 336 Number 4

Summary of Diagnostic Workup
 It is a life threatening condition which requires
early intervention to prevent high mortality
 Concurrent infection, severe anemia and long
mechanical dependence are poor prognostic
markers
 Aim for an early bronchoscopy to document
hemorrhage and exclude infection
 Biopsy (open lung or renal with IF) can be
extremely helpful and reassuring

Summary of Treatment
 Common practice to use of Pulse dose steroids
and Cytoxan in life threatening renal and
pulmonary involvement
 There is good data early use of plasma exchange
followed by IVIG in life threatening and
treatment resistant cases
 Plasma exchange has been helpful in situations
with concomitant need for anticoagulation

Pulmonary Renal Syndorme

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