sentences:  LG most commonly affects middle aged people, but has occasionally been observed in young people.Males are found to be affected twice as often as females.Lymphomatoid granulomatosis involves malignant B cells and reactive, non-malignant T cells and is almost always associated with infection of the malignant B cells by the Epstein-Barr virus; it is therefore considered to be a form of the Epstein-Barr virus-associated lymphoproliferative diseases.