On 28 June 2017, oncologist Dr Ang Peng Tiam in Singapore was suspended for eight months for professional misconduct. Seven years ago, Ang had presented false information and unsubstantiated advice to a lung cancer patient who died after taking chemotherapy as he recommended. Dr George Lee discusses walking the tightrope of medical advice with oncologists Dr Mastura Md Yusof and Prof Dr Woo Yun Ling.