Pleural Calcifying Fibrous Tumor

**Semantic type:** Neoplastic Process

**Definition:** A rare, benign, well-circumscribed lesion arising from the pleura. It is characterized by the presence of fibroblasts, lymphoplasmacytic infiltrates, collagenous stroma formation, and dystrophic calcifications. Patients may present with chest pain, dyspnea, cough, or may be asymptomatic.