Goodpasture’s syndrome with absence of circulating anti-glomerular basement membrane antibodies: a case report
© The Author(s). 2016
Received: 17 February 2016
Accepted: 28 June 2016
Published: 27 July 2016
Goodpasture’s syndrome, a rare disease, is an organ-specific autoimmune disease mediated by anti-glomerular basement membrane antibodies. Its pathology is characterized by crescentic glomerulonephritis with linear immunofluorescent staining for immunoglobulin G on the glomerular basement membrane. Although rare, a few cases with absence of circulating anti-glomerular membrane antibodies have been described.
The objective of this clinical case report is to describe and discuss a case of a 27-year-old white man who was hospitalized with a 1-year history of weight loss and a 1-month history of hemoptysis, with aggravation the day before, having developed dyspnea and cough in the previous 24 hours. An analytical study showed normocytic normochromic anemia with a hemoglobin level of 7.2 g/dL and leukocytosis with normal renal function and coagulation times. A blood transfusion was performed without complications. Chest computed tomography revealed a reticulonodular infiltrate of both lungs. Bronchoscopy showed no apparent lesions. Sputum cultures, rapid urine antigens for Legionella pneumophila and Streptococcus pneumoniae, studies for Influenza, virologic markers and serologic studies for autoimmunity were all negative. At the end of the tenth day his general state deteriorated with fatigue, hematuria, and in 3 days he developed aggravation of renal function with recurrent hemoptysis and anemia. Immunosuppression with daily prednisolone 1 g administered intravenously was initiated. An urgent bronchoscopy showed no lesions. A kidney biopsy showed fibrinoid necrosis and cellular crescents. Immunofluorescence revealed a linear immunoglobulin G deposition compatible with Goodpasture’s syndrome. Immunosuppressive therapy with daily cyclophosphamide 120 mg orally was added. Subsequently he was transferred to a referral center at which 21 sessions of plasmapheresis and four sessions of hemodialysis were performed with good response; he currently has no need of hemodialysis.
The absence of circulating anti-glomerular basement membrane antibodies in Goodpasture’s syndrome adds complexity to the diagnosis creating an unusual setting in a rare disease. In our case a kidney biopsy was essential for diagnosis and clinical approach. Studies have shown that early aggressive therapy leads to an improved prognosis. Physicians should consider tissue diagnoses such as bronchoscopy and kidney biopsy in pulmonary renal syndrome.
KeywordsAnti-GBM antibodies GBM Glomerular basement membrane Goodpasture’s syndrome Glomerulonephritis Renal failure Rapidly progressive glomerulonephritis Case report
Goodpasture’s syndrome (GS) is a rare disease, identified by Ernest Goodpasture . It is an organ-specific autoimmune disease that is mediated by anti-glomerular basement membrane (anti-GBM) antibodies and its pathology is characterized by crescentic glomerulonephritis with linear immunofluorescent staining for immunoglobulin G (IgG) on the glomerular basement membrane (GBM). Its typical presentation is acute renal failure due to rapidly progressive glomerulonephritis, as well as pulmonary hemorrhage, which may be life-threatening [2, 3]. It is estimated that the incidence of GS is one case per million per year; however, it is responsible for acute renal failure in approximately 20 % of all cases of rapidly progressive or crescentic glomerulonephritis . In the 1950s, Krakower and Greenspon  identified the GBM as the antigen. The titer of circulating autoantibodies is considered a measure of disease severity correlating with renal outcomes .
The objective of this clinical case report is to describe and discuss the case of a young man who presented with acute pulmonary and renal involvement with atypical features of GS.
A 27-year-old white man was hospitalized on 17 September 2014 with dyspnea and cough, which had started the day before, and a 1-month history of small-volume hemoptysis, which had aggravated in the last 24 hours. He also reported a history of weight loss, corresponding to 12 % of his corporal mass in the past year, but no other accompanying symptoms. He reported a cigarette smoking habit of 4 pack years, having occasionally smoked recreational drugs (cannabis). He was also professionally exposed to chemical toxics: thinners. There was no previous history of renal or pulmonary disease. No family disease was known and he had no other relevant findings in his past medical history.
Analytical evolution for the period of hospitalization
Admission (17 September 2014)
Post-transfusion (2 blood units; 18 September 2014)
Recurrence of hemoptysis (27 September 2014)
Post-transfusion (29 September 2014)
C-reactive protein (mg/dl)
Prothrombin time (seconds)
Activated partial thromboplastin time (seconds)
GS typically occurs between the ages of 20 and 30 years and between the ages of 60 and 70 years; the prevalence of the disease is higher in men in the younger age group, as in our case, whereas males and females are equally affected in the older age subgroup . Although the exact cause of GS is unknown, there are certain behaviors and environmental factors that may put people at higher risk. Some factors such as viral respiratory infections, exposure to hydrocarbon fumes, metallic dust, tobacco smoke or substances such as cocaine might be involved  and were found in our patient assessment. Symptoms may either start slowly, gradually affecting the lungs and the kidneys, or they may progress rapidly, becoming severe in a matter of days . Constitutional symptoms may precede or be concurrent with pulmonary or renal manifestations. In general, there are substantial variations in the clinical manifestations of patients with GS, with 60 to 80 % of the patients having clinically apparent manifestations of pulmonary and renal disease, 20 to 40 % having renal manifestations alone, and less than 10 % having only pulmonary manifestations [6, 7]. Our case had a bimodal presentation with an initial pulmonary involvement phase that evolved to an almost asymptomatic state followed by a fast pulmonary and renal degradation phase in a matter of 3 days requiring a fast clinical approach.
Diagnosis of GS is made by detection of circulating anti-GBM antibodies on solid phase, and a kidney biopsy provides a definitive diagnosis with pathognomonic findings on direct immunofluorescence of linear deposition of immunoglobulin  that was evident in our case; serologic assays for anti-GBM antibodies are valuable for confirming the diagnosis and monitoring the adequacy of therapy [3, 7]. Radioimmunoassays or enzyme-linked immunosorbent assays (ELISAs) for anti-GBM antibodies are highly sensitive (>95 %) and specific (>97 %); immunoassay-based anti-GBM antibody kits showed comparably good sensitivity . In our case, blood samples were processed shortly after collection in our laboratory, which used a EliA™ System (Phadia, Freiburg, Germany). The assay was performed twice on an ImmunoCAP 250 instrument with a sensitivity of 96.4 % and a specificity of 100 %.
At some time during the course of illness, one-third of patients with GS have circulating anti-neutrophil cytoplasmic antibodies (ANCAs) in addition to anti-GBM antibodies. In most cases, ANCAs are detectable several months to years before the development of the disease [3, 6, 7], which was not verified in our patient. In patients with evidence of diffuse alveolar hemorrhage and renal involvement, a kidney biopsy should be considered to identify the underlying cause. Percutaneous kidney biopsy, which is subsequently analyzed by light microscopy, immunofluorescence, and electron microscopy, is the preferred diagnostic procedure  and was the cornerstone of our case, performed on time, confirming the diagnosis.
The three principles of therapy include: a) rapid removal of circulating antibodies, primarily by plasmapheresis; b) pharmacological immunosuppression to prevent further production of antibodies; and c) removal of the offending agents that may have triggered the antibody production. Immunosuppressive therapy is required to inhibit antibody production and rebound hypersynthesis, which may occur following discontinuation of plasma exchange [2, 7, 10]. High-dose corticosteroids and cyclophosphamide represent the standard therapy. Initial therapy includes cyclophosphamide 2 mg/kg orally, adjusted to maintain a white blood cell count of approximately 5000 cells, and corticosteroids, which were the choices in this clinical case.
Aggressive therapy with plasmapheresis, corticosteroids, and immunosuppressive agents has dramatically improved the prognosis of GS . Currently, the 5-year survival rate exceeds 80 % and fewer than 30 % of patients require long-term dialysis, as was the case with our patient. Serum creatinine levels greater than 4 mg/dl, oliguria, and the presence of crescents in more than 50 % of glomeruli on renal biopsy predict a worse outcome, with recovery being rare. Until today, no studies on the best treatment of the syndrome have been performed because of the rarity and the sometimes late diagnosis of the syndrome . A correct diagnosis is the first important step to establish correct treatment. In a published case series and in a randomized trial, plasmapheresis was shown to be beneficial in the treatment of GS by the removal of anti-GBM antibodies . Renal transplantation has been used in end-stage renal disease secondary to GS ; this was discussed with our patient, but fortunately he had recovery of renal function obviating the need for this option. Although rare, the absence of circulating anti-GBM has already been described . Of interest, our case is similar to the first case reported by Salama et al. . The two cases have sex, age group, exposure to risk factors (solvents), and the time of development in common. However, presentation was different; although our case emphasizes the 1-month history of hemoptysis with aggravation the day before admission, Salama et al. refer solely to one episode of mild hemoptysis . Furthermore, our patient improved after admission before final clinical deterioration started. In both cases, a renal biopsy was diagnostic. Treatment was also comparable because both patients underwent plasmapheresis and were administered prednisolone orally and cyclophosphamide orally. Evolution was sustainably favorable in the two cases: 8 weeks after initial presentation their patient’s serum creatinine level was 2.5 mg/dL  as opposed to our patient who showed a serum creatinine level of 1.8 mg/dL 1 month after initial presentation. In our laboratory, Western blot and biosensor analysis were not available and, thus, further comparisons were not possible.
GS is a rare syndrome with many types of presentation but it has to be considered in patients presenting with pulmonary hemorrhage or anemia despite the absence of anti-GBM antibodies. A kidney biopsy becomes essential when confronted with this type of presentation, changes in renal function, and clinical suspicion. Although no studies have been performed for treatment approach, with early diagnosis and therapy, survival rates have increased.
The absence of anti-GBM antibodies adds complexity to the diagnostic approach creating an unusual setting in an already rare and complex disease.
ANCA, anti-neutrophil cytoplasmic antibody; anti-GBM, anti-glomerular basement membrane; BP, blood pressure; CO2, carbon dioxide; CT, computed tomography; CXR, chest X-ray; ELISA, enzyme-linked immunosorbent assay; GBM, glomerular basement membrane; GS, Goodpasture’s syndrome; ICU, intensive care unit; IgG, immunoglobulin G; pO2, partial pressure of oxygen.
We thank Dr Pedro Pereira for kindly supplying the image of renal biopsy and Dr Ana Raquel Mendes for the revision of the English version of the case report.
We declare that this case report received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.
RF elaborated the manuscript, compiled all the clinical data, and followed the patient during his hospital stay. SF participated in the design and bibliographical revision of the article having been responsible for the patient in the emergency department. PC participated in the design and bibliographical revision of the article having been the senior doctor responsible for the patient throughout his hospital stay in Internal Medicine Department. GA was responsible for the patient’s transfer to the hemodialysis center and helped to draft the manuscript. JC performed the renal biopsy, and coordinated and reviewed the document. All authors read and approved the final manuscript.
The authors declare that they have no competing interests.
Ethics approval and consent to participate
Written informed consent was obtained from the patient for publication of this case report and accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
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