Immune mediated colitis caused by lung cancer treatment with atezolizumab

Santiago González Vázquez1, Susana de la Riva Onandía2, José Ignacio Echeveste3

  • 1Servicio de Digestivo, Clínica Universidad de Navarra, España.

Atezolizumab is an IgG1 isotype monoclonal antibody against the protein programmed cell death-ligand 1 (PD- L1). PD-L1 may be highly expressed in some tumors and is believed to inhibit immune cells that recognize and attack tumor cells. Inhibition of PD-L1 can remove its inhibitory effect and provoke an anti-tumor response. In October 2016, the Food and Drugs Administration (FDA) approved atezolizumab for the treatment of patients with metastatic non-small cell lung cancer after disease progression during or following platinum based chemotherapy. We present the case of a 43-year-old male with stage IV lung adenocarcinoma in progression, despite standard chemotherapy.

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