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Polymyositis is an acute or chronic inflammatory myopathy, being its association with malignancy object of controversy. We report a case of a young male patient, in whom the presence of brain metastases and polymyositis were the initial manifestation of a neoplasm of unknown origin, fact rarely described in literature.
The angiofollicular lymph node hyperplasia (Castleman's disease) is an entity of unknown etiology. Its diagnosis is based on clinical and histological criteria. We present the case of a 20-year-old male patient with asymmetric oligoarthritis and fever which response to nonsteroidal antiinflammatory drugs as onset of abdominal Castleman's disease mixed type.