Churg-strauss syndrome with eosinophilic myocarditis: a clinical pathology conference held by the division of rheumatology at hospital for special surgery

The Diagnostic Challenge of Eosinophilic Granulomatosis With Polyangiitis Presenting as Acute Eosinophilic Myocarditis: Case Report and Literature Review

Eosinophilic granulomatosis with polyangiitis (EGPA) is a systemic vasculitis involving small-to-medium-sized vessels characterized by asthma, vasculitis, and peripheral eosinophilia. EGPA-associated eosinophilic myocarditis (EM) occurs rarely, yet can be fatal if left untreated. Moreover, the accurate diagnosis of EGPA-associated EM without vasculitis is exceptionally difficult because of the overlapping features with EM of other causes. We report a case of probable EGPA with subclinical neurological involvement that presented with acute EM. The constellation of peripheral eosinophilia, left ventricular dysfunction, and normal epicardial coronary arteries raised suspicion of acute EM, which was confirmed by cardiac magnetic resonance (CMR) investigation and endomyocardial biopsy (EMB). Prompt systemic administration of corticosteroids completely restored and normalized myocardial structure and function. Although the patient's history suggested the presumed hypersensitivity myocarditis, EMB revealed EM without vasculitis, not hypersensitivity, leading to a tentative diagnosis of idiopathic hypereosinophilic syndrome. Interestingly, the characteristic findings of vasculitis on CMR imaging strongly suggested EGPA-associated EM. Although the patient had no clinical neurological manifestations, a nerve conduction study confirmed mononeuritis multiplex, leading to the final diagnosis of probable EGPA. Therefore, this case highlights the diagnostic challenge associated with EGPA and the diagnostic synergy of CMR and EMB for an exploratory diagnosis of EGPA-associated EM.

Eosinophilic myocarditis as a first presentation of eosinophilic granulomatosis with polyangiitis (Churg-Strauss syndrome)

We present the case of a 28-year-old man who presented with chest pain and elevated cardiac biomarkers, with no evidence of acute ischaemia. He had a pronounced eosinophilia, abnormal echocardiographic, cardiac MRI and CT findings. He underwent transbronchial biopsy of carinal lymph nodes and of lung parenchyma. Endomyocardial biopsy yielded an eosinophilic infiltrate. He was treated with high dose glucocorticoids and made a rapid recovery. Testing for FIP1L1-PDGFRA and other BCR-ABL1 mutations was negative. Ultimately, he was diagnosed with eosinophilic granulomatosis with polyangiitis, also known as Churg-Strauss syndrome.

Missing the beat: arrhythmia as a presenting feature of eosinophilic granulomatosis with polyangiitis

Palpitations are a common presenting symptom in patients attending the emergency department; however, eosinophilic infiltration of the myocardium is rarely the cause. This case describes a 77-year-old woman who presents with sudden onset palpitations and is later diagnosed with eosinophilic granulomatosis with polyangiitis (previously known as Churg-Strauss syndrome). Cardiac involvement does occur in 50% of cases but heart failure, myocarditis, pericarditis, constrictive pericarditis and myocardial infarction are much more commonly recognised complications. Arrhythmia is less well described. In this report, we propose eosinophilic inflammation as the precipitant for an aberrant conduction pathway.

Is this an exacerbation of asthma? A cautionary tale

Asthma exacerbations are a fairly common presentation to emergency departments. However, a careful history, clinical examination and interpretation of investigations may uncover a more serious pathology. We present an interesting case of a 44-year-old man with symptoms suggestive of an asthma exacerbation, who was found to have Churg-Strauss vasculitis/eosinophilic granulomatosis with polyangitis. He had clinical features of a vasculitis, ECG changes and a troponin T level of 7562 ng/L. Renal biopsy confirmed Churg-Strauss vasculitis. Cardiac involvement in Churg-Strauss Syndrome (CSS) is one of the leading causes of mortality. We describe the successful diagnosis and management of a patient with CSS.