RT Journal A1 Guardia J, Pedreira J, Esteban R, Vargas V, Allende E T1 EArly pleural effusion in histiocytosis x JF Archives of Internal Medicine JO Archives of Internal Medicine YR 1979 FD August 1 VO 139 IS 8 SP 934 OP 936 DO 10.1001/archinte.1979.03630450076025 UL http://dx.doi.org/10.1001/archinte.1979.03630450076025 AB Two cases of histiocytosis X, one of the disseminated form and the other localized to the lung, are reported, in which pleural effusion, probably due to pleural involvement as assessed by biopsy, was one of the initial manifestations of the disease.(Arch Intern Med 139:934-936, 1979)