His wife Gita Sen told PTI that the operation went off well and he was recovering now. He would be discharged soon.
91-year-old Mrinal Sen, along with Satyajit Ray and Ritwik Ghatak, had changed the profile of Indian cinema in the eyes of the world.
Besides bagging four national film awards as the best director for works like 'Khanadhar' (1984) and 'Bhuvan Shome' (1969), he was also awarded the Dadasaheb Phalke Award, India's highest award in cinema, in 2005.