whatever their cytological , lymphocytic , lymphoblastic or reticular type ( hodgkin 's disease was excluded from this study ) , they may be grouped in two main pathological categories : 1 ) malignant lymphoma involving the lung and mediastinum without extra-thoracic lesions detected at the time of diagnosis ( 4 cases ) .
C0019829
hodgkin 's disease
C0024299
malignant lymphoma