A transient increase and subsequent sharp decrease of chemo-refractory liver-metastasized uterine cervical small cell carcinoma to autologous formalin-fixed tumor vaccine plus anti-PD-1 antibody.

Uterine cervical small cell carcinoma is rare and aggressive with no standardized therapy. A patient bearing the advanced chemo‐refractory carcinoma, treated with a tumor vaccine combined with 1 mg/kg of pembrolizumab, showed a transient increase and subsequent sharp decrease of the liver‐metastasized lesion to less than half its maximum diameter.