Non-Hodgkin lymphoma is a cancer that affects the lymphatic system. The document discusses the World Health Organization's 5th edition classification of T-cell and NK-cell lymphomas and lymphoid proliferations. It was presented by Dr. Lekhraaj Gautam from the Department of Pathology at Tezpur Medical College Hospital and moderated by Dr. Akash Pradeep Bhuyan, also from the Department of Pathology.