History and clinical findings: A 47-year-old woman was admitted becaus
e of diarrhoea (3-5 stools daily) for 9 days, weakness for 3 weeks and
painful wrist swelling, arthralgia and hypaesthesia over the medial a
spect of the right thigh for 6 weeks. For 6 years she had been treated
for asthma. Two operation had been performed for chronic sinusitis. A
dmission findings and investigations: There was marked eosinophilia (5
889/mu l) and thrombocytopenia (96 000/mu l), markedly increased serol
ogical inflammatory parameters and a raised total IgE level (134 IU/ml
). The chest radiogram; showed pulmonara infiltrates and bone marrow b
iopsy indicated eosinophilia. Echocardiography revealed a mass, 3 x 8
cm, in the ventral wall of the right ventricle with extension into the
outflow tract. Diagnosis, treatment and course: These findings met th
e criteria of the American College of Rheumatology. for Churg-Strauss
syndrome (CSS). On methylprednisolone (1 mg/kg daily) the eosinophil a
nd platelet counts became normal within 5 days and erythrocyte sedimen
tation rate and the level of C-reactive protein fell. Under cardiopulm
onary bypass the tumour was removed, the tricuspid valve replaced, and
the right ventricle reconstructed. Histology of the mass revealed it
to be an organized thrombus. Conclusion: The relationship between the
thrombus formation and CSS is unclear. Hypercoagulability connected wi
th the inflammatory process may have played a part In the pathogenesis
.