CD274 and pachyonychia congenita: Additionally, PD-L1 positive expression was detected in liver metastases in a patient with metastatic PC who had received toripalimab (240 mg Q3W) and gemcitabine (1000 mg/m2 on day 1 and 8 every 3 weeks) plus nab-paclitaxel (125 mg/m2 on day 1 and 8 every 3 weeks).