ATG7 and oligodendroglioma: Interestingly, among the 34 GBM cases which exhibited high immunohistochemical expression of SRSF1, high ATG7 and ATG4 levels were found in 27/34 (79%) and 23/34 (68%) cases, respectively; the 15 oligodendrogliomas characterized by high SRSF1 immunoexpressions, also had high levels of ATG7 in 11/15 cases (73%).