title: Middle lobe syndrome as an unusual presentation of metastatic osteogenic sarcoma.
mesh_terms: D000368:Aged; D006801:Humans; D008175:Lung Neoplasms / Q000150:complications / Q000556:secondary*; D008297:Male; D008878:Middle Lobe Syndrome / Q000209:etiology*; D012516:Osteosarcoma / Q000150:complications / Q000556:secondary*