A rare case of fibrosing mediastinitis from histoplasmosis with extrinsic compression of the right pulmonary artery is reported. A 41-year-old patient presented with worsening symptoms of cough, fever, migratory arthralgia, chest pain, and progressive dyspnea. The pulmonary artery involvement was suspected by transthoracic echo and was confirmed by transesophageal echo, CT scan of chest, and right heart catheterization. Diagnosis of histoplasmosis was confirmed by biopsy and serological tests. Patient has been free from symptoms of pulmonary stenosis for 4 years after successful pulmonary artery stenting.
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