Which antibody is present in less than 50% of Churg-Strauss syndrome cases?

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Prepare for the CVP and GI Pathology Exam with our quiz. Study with interactive flashcards and challenging multiple choice questions. Each question comes with explanations and hints. Boost your confidence and knowledge!

Multiple Choice

Which antibody is present in less than 50% of Churg-Strauss syndrome cases?

Explanation:
In eosinophilic granulomatosis with polyangiitis (Churg-Strauss), the most commonly detected antibody is MPO-ANCA in a perinuclear pattern (p-ANCA), but it’s not present in all patients. This pattern appears in roughly a third to about 40% of cases, i.e., less than half. The PR3-ANCA (C-ANCA) pattern is less typical for this disease, while ANA and RF are nonspecific and not characteristic findings. Therefore, the antibody present in less than 50% of cases is P-ANCA.

In eosinophilic granulomatosis with polyangiitis (Churg-Strauss), the most commonly detected antibody is MPO-ANCA in a perinuclear pattern (p-ANCA), but it’s not present in all patients. This pattern appears in roughly a third to about 40% of cases, i.e., less than half. The PR3-ANCA (C-ANCA) pattern is less typical for this disease, while ANA and RF are nonspecific and not characteristic findings. Therefore, the antibody present in less than 50% of cases is P-ANCA.

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