Bronchiolitis obliterans complicating follicular lymphoma: a case series and clinical insights.

Tumor-associated bronchiolitis obliterans (BO) is a major cause of death and is frequently complicated by paraneoplastic pemphigoid (PNP). In this study, three cases of follicular lymphoma (FL) with BO were retrospectively analyzed. All cases were complicated by PNP. All patients achieved a tumor response with anti-CD20 monoclonal antibody-containing treatment, and two patients showed clinical improvement in PNP. However, BO continued to progress, and two of the three patients developed pulmonary infections.