IN THIS article the involvement of certain organs will be discussed.Hilar Nodes and Mediastinal Tumor Hodgkin's Paragranuloma As has already been noted, involvement of the mediastinal lymph nodes occasionally occurs in Hodgkin's paragranuloma, and from the limited series of cases that have been under our observation, such involvement does not appear to alter the prognosis. Massive mediastinal tumors do not occur. Hodgkin's Granuloma It is a frequent event in Hodgkin's granuloma to find enlargement of the hilar nodes or the development of a large mediastinal tumor (Figs. 1 and 2). Peirce,1 not all of whose cases were subjected to biopsy . . .