A 69-year-old female was referred to our institution due to abdominal pain and palpable purpura on both buttocks and legs. A skin biopsy of her purpura revealed granulocyte infiltration and leucocytoclasia around the arterioles and venuoles at the dermis, as well as an elevated serum immunoglobulin A level, hematuria and proteinuria. Therefore she was diagnosed with Henoch-Schönlein purpura. She had been diagnosed with diffuse large B cell lymphoma after a biopsy of her left inguinal lymph node 12 years ago and received 6 cycles of CHOP (cyclophosphamide, doxorubicin, vincristine and prednisone) chemotherapy, which was followed by a complete remission. Abdominal and chest CT revealed multiple lymph node enlargement and bowel wall thickening at the ileocecal area, and lesions were observed in a whole body PET CT scan. Recurrence of the diffuse large B cell lymphoma was confirmed by a biopsy of the ileocecal area via colonoscopy. The purpura was improved after oral prednisolone therapy and etoposide, oxaliplatin and ifosfamide salvage combination chemotherapy was used to treat the lymphoma.

Keywords: Henoch-Schö,nlein purpura, Diffuse large B cell lymphoma, Malignancy, Vasculitis