Hemangioma Key Facts Clinical Issues Rare tumor Affects broad age range, from newborns to old age More frequent in children and young adults Anterior and posterior mediastinum Some cases may…

Klebsiella Pneumonia Key Facts Terminology Synonym Friedlander pneumonia Definition Infectious condition caused by Gram-negative bacteria Etiology/Pathogenesis Klebsiella pneumoniae Nonmotile, usually encapsulated bacillus > 80 different types Clinical Issues Klebsiella pneumonia…

Malignant Solitary Fibrous Tumor (Fibrosarcoma) Key Facts Macroscopic Features Diffuse growth Poorly circumscribed Invasion of adjacent structures Areas of necrosis Hemorrhage Microscopic Pathology Dense atypical spindle cell proliferation Fascicular, herringbone,…

Angiosarcoma Key Facts Macroscopic Features Diffuse, plaque-like growth encasing pleura Abundant hemorrhage and necrosis Infiltration of adjacent structures Microscopic Pathology Solid atypical epithelioid or spindle cell proliferation Anastomosing vessel-like channels…

Smooth Muscle Tumors of the Pleura Key Facts Clinical Issues Incidence Exceedingly rare tumors in pleura Tumor affects individuals in wide range of ages (20-70 years) Symptoms Chest pain Empyema…

Calcified Fibrous Pseudotumor Key Facts Terminology Calcified fibrous pseudotumor (CFPT) Clinical Issues Cough Chest pain Shortness of breath Asymptomatic Macroscopic Features Single pleural mass Multiple pleural nodules Microscopic Pathology Dense…

Pseudomesotheliomatous Adenocarcinoma Key Facts Terminology Malignant epithelial neoplasm of lung origin growing along pleural surface Etiology/Pathogenesis Has been linked to the following Tobacco use Asbestos exposure Iron exposure Stone dust…

Synovial Sarcoma Key Facts Macroscopic Features Large, well-circumscribed, pleural-based mass May extend along pleural surface mimicking malignant mesothelioma May show cystic and hemorrhagic changes Microscopic Pathology May be biphasic or…