Answer

From the question on page 214

Churg-Strauss syndrome (CSS) was diagnosed on the basis of extensive vasculitis in a sural nerve biopsy, tissue eosinophilia in a cecum biopsy (see figure in online supplement) and peripheral eosinophilia (11%, observed only once).1 The cecum biopsy was performed because anaemia had become microcytic; pathological analysis was consistent with an eosinophilic gastroenteritis. p-Antineutrophil cytoplasmic (titre 1:1280) and anti-myeloperoxidase (657 U/ml) antibodies were strongly positive. CSS disease activity markers soluble interleukin-2 receptor (7748 pg/ml) and …