A critical analysis of 57 cases of Hughes-Stovin syndrome (HSS). A report by the HSS International Study Group (HSSISG)

Pulmonary embolism versus pulmonary vasculitis in Hughes-Stovin syndrome: Characteristic computed tomography pulmonary angiographic findings and diagnostic and therapeutic implications. HSS International Study Group

BACKGROUND AND AIM

Hughes-Stovin syndrome (HSS) is a rare systemic vasculitis with widespread venous/arterial thrombosis and pulmonary vasculitis. Distinguishing between pulmonary embolism (PE) and in-situ thrombosis in the early stages of HSS is challenging. The aim of the study is to compare clinical, laboratory, and computed tomography pulmonary angiography (CTPA) characteristics in patients diagnosed with PE versus those with HSS.

METHODS

This retrospective study included 40 HSS patients with complete CTPA studies available, previously published by the HSS study group, and 50 patients diagnosed with PE from a single center. Demographics, clinical and laboratory findings, vascular thrombotic events, were compared between both groups. The CTPA findings were reviewed, with emphasis on the distribution, adherence to the mural wall, pulmonary infarction, ground glass opacification, and intra-alveolar hemorrhage. Pulmonary artery aneurysms (PAAs) in HSS were assessed and classified.

RESULTS

The mean age of HSS patients was 35 ± 12.3 years, in PE 58.4 ± 17 (p < 0.0001). Among PE 39(78 %) had co-morbidities, among HSS none. In contrast to PE, in HSS both major venous and arterial thrombotic events are seen.. Various patterns of PAAs were observed in the HSS group, which were entirely absent in PE. Parenchymal hemorrhage was also more frequent in HSS compared to PE (P < 0.001).

CONCLUSION

Major vascular thrombosis with arterial aneurysms formation are characteristic of HSS. PE typically appear loosely-adherent and mobile whereas "in-situ thrombosis" seen in HSS is tightly-adherent to the mural wall. Mural wall enhancement and PAAs are distinctive pulmonary findings in HSS. The latter findings have significant therapeutic ramifications.

[Hughes-Stovin syndrome: a life-threatening manifestation of Behçet's syndrome]

Hughes-Stovin syndrome (HSS) is a systemic inflammatory condition of unknown origin that is considered to be part of the Behçet's syndrome (BS) spectrum. Recurrent venous thrombosis and superficial thrombophlebitis in combination with bilateral pulmonary artery aneurysms (PAA) represent the hallmark of HSS. The diagnostic evaluation includes computed tomography pulmonary angiography to detect signs of pulmonary vasculitis. The management of HSS is based on the European Alliance of Associations for Rheumatology (EULAR) recommendations for BS and mainly comprises immunosuppressive therapy with glucocorticoids and cyclophosphamide. In addition to drug therapy, PAA should be evaluated for interventional treatment. Spontaneous PAA rupture due to fragile vessel architecture can occur even in cases of remission and/or PAA regression.

Case Report: In situ pulmonary artery thrombosis in a 12-year-old girl classified as systemic lupus erythematosus

In situ pulmonary artery thrombosis (ISPAT) is a relatively rare but potentially life-threatening complication of systemic lupus erythematosus (SLE) in children. We report the case of a 12-year-old girl who presented with fever, chest pain, and dyspnea. Immune thrombocytopenia was identified due to purpura and menorrhagia 3 months before presentation with a lowest platelet count of 12 × 109/L. The sudden onset of fever, chest pain, and dyspnea were misdiagnosed as hyperinflammatory responses caused by pneumonia; these symptoms ameliorated with glucocorticoid and antibiotic treatment. The reappearance of symptoms after dose reduction of glucocorticoids and the observation of bloody bronchoalveolar lavage fluid necessitated further evaluation. Pulmonary artery thrombosis/embolism was identified using computed tomography pulmonary angiography and high D-dimer quantitative level of 4,118 μg/L (normal <252 μg/L). Ultrasonography of the deep and superficial veins of both lower limbs and renal veins revealed no thrombosis, suggesting the diagnosis of ISPAT. Further etiological evaluation revealed positive antinuclear antibodies, lupus anticoagulant, and anti-SSA antibodies, confirming SLE. Repeated normal urine analysis indicated that lupus nephritis was unlikely. Further, the negative anticardiolipin and anti-β2 glycoprotein antibodies and temporary positive lupus anticoagulant suggested that antiphospholipid syndrome was unlikely. The patient received anticoagulants, glucocorticoids, hydroxychloroquine, and mycophenolate therapy. Her symptoms gradually improved, and she was discharged. At the 1-month follow-up, the thrombosis had resolved. During the 1-year follow-up, her condition remained well without SLE relapse. Our experience with this case emphasizes searching for SLE in the case of ISPAT and pulmonary hemorrhages. ISPAT can occur in children with SLE and may be caused by hyperinflammatory response during SLE flare.

Hughes-Stovin syndrome-An important differential diagnosis in patients with suspected chronic thromboembolic pulmonary hypertension : A case report

Hughes-Stovin syndrome (HSS) is a rare vasculitis of unknown etiology. The disease is characterized by pronounced inflammation and damage to the vessel walls, with subsequent widespread vascular thrombosis and the formation of pulmonary artery aneurysms that can lead to fatal hemoptysis. This disorder can be mistaken for other conditions, such as chronic thromboembolic pulmonary disease (CTEPD) without or with pulmonary hypertension at rest (CTEPH).We report the case of a 20-year-old female with HSS, which was misdiagnosed as CTEPH and subsequently treated with anticoagulants, which led to severe hemoptysis and eventually death of the patient. This case highlights the challenges of diagnosing HSS at early stages of the disease.HSS should be considered in young patients with signs of large vessel vasculitis in combination with thrombotic occlusions of pulmonary arteries, with or without aneurysms of the pulmonary arteries, and particularly, if there are no risk factors for thromboembolic disease.

Hughes‒Stovin Syndrome

We present an extremely rare case of Hughes‒Stovin syndrome, of which we believe <60 cases have been reported in English medical literature. We wish to draw the attention of our fellow cardiologists to consider this when coming across patients with pulmonary artery aneurysm in their clinical practice. Appropriate treatment, if instituted promptly and early in the course of the disease, has the potential to induce remission.

Scoping beyond pulmonary artery involvement; pulmonary involvement in Behcet's disease; a retrospective analysis of 28 patients

OBJECTIVES

Pulmonary involvement other than pulmonary artery involvement in Behcet's disease still remains an area of investigation. The aim of this study was to evaluate pulmonary involvement associated with Behcet's disease.

METHOD

We retrospectively investigated all Behcet's disease patients in terms of pulmonary involvement. Twenty-eight patients, whose radiologic examinations were consistent with Behcet's disease-related involvement after excluding other possibilities, were included in this study. Data regarding demographic characteristics, other clinical components of Behcet's disease, treatment modalities, and types of pulmonary involvement were analyzed.

RESULTS

Pulmonary involvement was seen more common in male (82.1% vs 17.9%). Mean age for Behcet's disease diagnosis was found 32 years (SD 10.9) and mean age for pulmonary involvement was calculated 37 years (SD 11.4). Deep vein thrombosis (DVT) was the most common associated vascular involvement (53.6%). In our study population, alveolar hemorrhage and/or ground glass appearance were seen in 46.4% (13/28) of BD patients with pulmonary involvement. Totally, pulmonary artery aneurysm (PAA), small-sized pulmonary vasculitis (sPV), and pulmonary thrombosis (PT) were seen in 7 (25%), 13 (46.3%), and 18 (64.4%) of patients, respectively. Intracardiac thrombosis (ICT) in the right ventricle was present in 5 patients. Cyclophosphamide (CYC) was the most common preferred agent (78%) followed by azathioprine (AZA) in the first line. Warfarin was used in 18 patients. Overall mortality was seen in 3 patients: 1 due to PAA bleeding and others with unknown causes.

CONCLUSION

Despite the importance of pulmonary artery involvement and pulmonary thrombosis in Behcet's disease, small-sized pulmonary vasculitis in the form of small vessel involvement is generally overlooked. Our study findings have shown that alveolar hemorrhage and/or ground-glass appearance in the absence of pulmonary artery aneurysm and pulmonary thrombosis are seen commonly as well. Key Points • The characteristics of pulmonary small vasculature involvement in Behcet's disease which is still an area of investigation warrant further attention. • The clinician should bear in mind that the spectrum of pulmonary involvement in Behcet's disease may be variable, but an extensive work up is still of great importance especially in atypical cases.

Frail Silk: Is the Hughes-Stovin Syndrome a Behçet Syndrome Subtype with Aneurysm-Involved Gene Variants?

Hughes-Stovin syndrome is a rare disease characterized by thrombophlebitis and multiple pulmonary and/or bronchial aneurysms. The etiology and pathogenesis of HSS are incompletely known. The current consensus is that vasculitis underlies the pathogenic process, and pulmonary thrombosis follows arterial wall inflammation. As such, Hughes-Stovin syndrome may belong to the vascular cluster with lung involvement of Behçet syndrome, although oral aphtae, arthritis, and uveitis are rarely found. Behçet syndrome is a multifactorial polygenic disease with genetic, epigenetic, environmental, and mostly immunological contributors. The different Behçet syndrome phenotypes are presumably based upon different genetic determinants involving more than one pathogenic pathway. Hughes-Stovin syndrome may have common pathways with fibromuscular dysplasias and other diseases evolving with vascular aneurysms. We describe a Hughes-Stovin syndrome case fulfilling the Behçet syndrome criteria. A MYLK variant of unknown significance was detected, along with other heterozygous mutations in genes that may impact angiogenesis pathways. We discuss the possible involvement of these genetic findings, as well as other potential common determinants of Behçet/Hughes-Stovin syndrome and aneurysms in vascular Behçet syndrome. Recent advances in diagnostic techniques, including genetic testing, could help diagnose a specific Behçet syndrome subtype and other associated conditions to personalize the disease management.

Successful Medical-Surgical Management of Intracardiac Thrombosis and Pulmonary Pseudoaneurysms in an Adolescent With Hughes-Stovin Syndrome

We present an adolescent male with a single intracardiac mass and pulmonary emboli, complicated by peripheral venous thrombosis and subsequent development of pulmonary pseudoaneurysms, leading to diagnosis of Hughes-Stovin syndrome. Remission was achieved with cyclophosphamide, corticosteroids, and pseudoaneurysm resection and maintained with infliximab and methotrexate.

Hughes-Stovin Syndrome: An Experience of Management of 3 Cases From a Tertiary Health Care Centre

Three young males with Hugh-Stovin's syndrome presented with cough, haemoptysis, fever, raised inflammatory markers, and pulmonary artery aneurysm. Only one had recurrent oral ulcers suggestive of Behcet's disease, and none were HLA B51 positive. All responded well to immunosuppression but eventually needed either an endovascular procedure or surgery.

Hughes-Stovin Syndrome and the Acute Management of Recurrent Pulmonary Aneurysms

Hughes-Stovin syndrome (HSS) is a rare autoimmune disease that is considered to be a variant of Behçet’s disease. It typically presents with multiple venous thrombi, thrombophlebitis, as well as pulmonary and bronchial aneurysms. The disease is typically associated with high morbidity and mortality in those diagnosed. This case discusses a 28-year-old male with HSS complicated by venous cardiac emboli and a mechanical valve on chronic anticoagulation. Despite medical and surgical management, the patient experienced continued progression of his pulmonary aneurysms and excessive bleeding, eventually requiring lung transplantation.

Recurrent Haemoptysis Revealing Hughes-Stovin Syndrome

Hughes-Stovin syndrome is a very rare condition with no defined diagnostic criteria. We present the case of a 26-year-old man who had haemoptysis revealing Hughes-Stovin syndrome. We will consider the aetiology, therapeutic and evolutionary aspects of this disease.

LEARNING POINTS

Hughes-Stovin syndrome is a very rare disorder of unknown aetiology which can be fatal.It is considered a variant of Behcet's disease.Early diagnosis and treatment improve prognosis.

Pulmonary vasculitis in Hughes-Stovin syndrome (HSS): a reference atlas and computed tomography pulmonary angiography guide-a report by the HSS International Study Group

Introduction

Hughes-Stovin syndrome (HSS) is a systemic vasculitis characterized by widespread venous/arterial thrombosis and pulmonary artery aneurysms (PAAs), which is associated with serious morbidity and mortality. All fatalities reported in HSS resulted from unpredictable fatal suffocating hemoptysis. Therefore, it is necessary to recognize pulmonary complications at an early stage of the disease.

Objectives

The aims of this study are to develop a reference atlas of images depicting the characteristic features of HSS by computed tomography pulmonary angiography (CTPA). To make a guide for physicians by developing a classification of PAAs according to the severity and risk of complications associated with each distinct lesion type.

Methods

The Members of the HSS International Study Group (HSSISG) collected 42 cases, with high-quality CTPA images in one radiology station and made reconstructions from the source images. These detailed CTPA studies were reviewed for final image selection and approved by HSSISG board members. We classified these findings according to the clinical course of the patients.

Results

This atlas describes the CTPA images that best define the wide spectrum of pulmonary vasculitis observed in HSS. Pulmonary aneurysms were classified into six radiographic patterns: from true stable PAA with adherent in-situ thrombosis to unstable leaking PAA, BAA and/or PAP with loss of aneurysmal wall definition (most prone to rupture), also CTPA images demonstrating right ventricular strain and intracardiac thrombosis.

Conclusion

The HSSISG reference atlas is a guide for physicians regarding the CTPA radiological findings, essential for early diagnosis and management of HSS-related pulmonary vasculitis.

Key Points • The Hughes-Stovin syndrome (HSS) is a systemic vasculitis characterized by extensive vascular thrombosis and pulmonary artery aneurysms (PAAs) that can lead to significant morbidity and mortality. • All fatalities reported in HSS were related to unpredictable massive hemoptysis; therefore, it is critical to recognize pulmonary complications at an early stage of the disease. • The HSS International Study Group reference atlas  classifies pulmonary vasculitis in HSS at 6 different stages of the disease process and defines the different radiological patterns of pulmonary vasculitis notably pulmonary artery aneurysms, as detected by computed tomography pulmonary angiography (CTPA). • The main aim of the classification is to make a guide for physicians about this rare syndrome. Such a scheme has never been reached before since the first description of the syndrome by Hughes and Stovin since 1959. This classification will form the basis for future recommendations regarding diagnosis and treatment of this syndrome.