TNF and lymphoma: Recently, a sensitive surface‐enhanced Raman scattering (SERS) nanotags‐based detection platform was developed for detection of cytokine TNF‐α secreted by Lymphoma cells with the sensitivity of 4.5 pg/mL,[107] which demonstrated the proof‐of‐concept for detection of three cytokines, IFN‐γ, TNF‐α, and IL‐10 secreted from the lymphoma cell lines upon the Con A stimulation although no calibration curve was generated.