KOLKATA: A mob ransacked the Chittaranjan National Cancer Institute on Monday after the death of a cancer patient. They also assaulted Dr Pratik Sheet, an on-duty junior resident doctor. He sustained minor injuries. Police had to intervene to stop the vandalism. The deceased, Gopal Kayal(32), was brought to the hospital around 2pm on Monday. Kayal, an autorickshaw driver, was suffering from tongue cancer and was a registered patient with the hospital as he underwent radiotherapy and chemotherapy there. Kayal was again brought to…