Abstract
We classified underlying diseases presenting as inflammation of unknown origin in division of rheumatic diseases. On the other hand, patients with malignant lymphoma (ML) varying in cause and symptoms are often admitted to our Rheumatology Division as cases of malignant disease presenting with fever of unknown origin. Clinical records over 5 years were reviewed for 246 cases of undiagnosed inflammatory diseases at hospitalization. The 246 patients included 76 patients with infection, 116 with rheumatic disease, 8 with solid cancer, 9 with drug-induced fever, 10 with other disorders, and 27 with suspected ML. Of theses, malignant lymphoma (ML) was diagnosed in 20 patients (5 Mature T-cell and NK-cell neoplasms, 3 Hodgkin lymphomas, and 12 Mature B cell neoplasms including 5 Intravascular large B-cell lymphoma (IVLBCL)). The reasons for hospitalization were underlying collagen disease in 6 patients, medical workup for fever of unknown origin in 8 patients, and symptoms suggestive of collagen disease in 6. Nearly all of these patients presented with fever and other B symptoms, frequently with concurrent hypoxemia and hemophagocytic syndrome in IVLBCL. For diagnostic purposes, biopsy sites were determined by 18 fluorodexyglucose-po...Continue Reading
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