Churg-Strauss syndrome: a diagnosis not to be forgotten.

Churg-Strauss syndrome (CSS) is a peculiar form of vasculitis with involvement of small- and medium-size arteries, histologically characterized by necrotizing granulomas in vessel walls and in perivascular tissues. The Authors report a case of CSS occurred in a young man being treated with corticosteroids for a diagnosis of asthma. The patient was hospitalized because of fever, diarrhoea and abdominal pain; the first assessment showed leucocytosis and eosinophilia,increase in flogosis indexes and anti-pANCA antibodies positive. A few days later an acute peritonitis with multiple intestinal perforations occurred and a partial resection of small bowel was performed,followed by another resection of an ileal segment because of a new double perforation close to the previous intestinal anastomosis. In the bowel resection pieces necrotizing vasculitis and granulomatous infiltrates involving lymphocytes and eosino- phils were observed. Although the severe intestinal involvement and especially the symptoms necessitating iterative surgery were significant factors of poor prognosis the patient was successfully treated firstly with metylprednisolone only and then with monthly administration of immunosuppressive drugs combined with lower daily dose of steroids. The CSS diagnosis is not to be forgotten althoughits early clinical features can be frequently mistaken for an allergic disease; an early diagnosis can allow to perform the best treatment, to reach the disease remission and to improve the quality of life of the patients.