Singer Sonu Nigam recently drew attention after a video showed him singing during a surgical procedure. While the exact reason for the surgery has not been publicly disclosed, the singer had earlier spoken about undergoing treatment for a painful nerve-related condition and said he had undergone multiple MRI and CT scans and was taking medication. The latest development has also raised questions about a recurring growth on his finger. Dr Nilesh G Satbhai, Director – Plastic, Reconstructive Microsurgery and Hand Transplantation, Nanavati Max Super Speciality Hospital, Mumbai, who operated Sonu Nigam told Ndtv Lifeline that the lesion was a digital mucous cyst, a benign swelling that commonly develops around the end joint of a finger. Although such a growth may appear small or harmless, its tendency to return can be linked to an underlying problem in the finger joint.