Solitary Fibrous Tumor of the Mediastinum: A Rare Tumor at a Rare Site

45 year old male presented with cough, chest pain and dyspnea and was found to have a mediastinal mass extending into the left hemi-thorax. At thoracotomy a 30 x 32 x 10 cm well-circumscribed mass was found consisting of spindle cells. Immunohistochemical stains were positive for Cluster of Differentiation (CD34), Anti Smooth Muscle Antibody(ASMA) patchy, but were negative for cytokeratin AEl/AEB, desmin, S-100, Cluster of Differentiation (CD31), Epithelial Membrane Antigen (EMA). Thus a diagnosis of solitary fibrous tumor was confirmed. The differential diagnosis of a mediastinal tumor are diverse while the clinical presentations are predominantly similar.