Pericardial effusion in a young patient with newly diagnosed systemic lupus erythematosus and a mediastinal mass.

We present the case of a 32-year-old-woman who was admitted to the hospital for evaluation of pericardial effusion. The subsequent diagnostic workup revealed the presence of a mediastinal mass along with systemic lupus erythematosus (SLE). The patient underwent thymectomy, and histological evaluation of the resected mass revealed thymic follicular hyperplasia without evidence of malignancy.