...a case of a man in his 80s...Pathology demonstrated morphologic and immunohistochemical (strongly cytokeratin-20, neuron specific enolase and CD56 positive and thyroid transcription factor-1 negative) findings in both lesions consistent with MCC...subsequently treated with nivolumab 3 mg/kg intravenously every 2 weeks for six cycles in 2015. He completely recovered with a slow steroid taper, and no further treatment with nivolumab was given.