Case Report: Angioimmunoblastic T-cell lymphoma initially diagnosed as eosinophilic granulomatosis with polyangiitis

This case underscores that AITL can closely mimic EGPA, presenting with severe asthma, hypereosinophilia, sinusitis, and systemic symptoms. It emphasizes the necessity of considering underlying lymphoma in patients with suspected EGPA who show an atypical or refractory course to conventional therapy. A definitive diagnosis often requires an adequate tissue sample, preferably from a surgical lymph node biopsy, to avoid misdiagnosis and ensure appropriate management. Respiratory physicians should maintain a high index of suspicion for lymphoid malignancies in such complex presentations.