Objective: To present an uncommon presentation of metastatic non-small cell lung cancer at mandible causing numb chin syndrome (NCS). diagnosed by PET/CT scan. Case presentation: A 72-year-old man presented with decreased sensation of left lower lip without motor deficit or taste alteration. so called NCS. https://www.roneverhart.com/HP-Notebook-15-da0008ca-HD-LED-15-6-Touchscreen-Intel-Core-i5-8250U-1-6-GHz-8-GB-RAM-1-TB-SSD-HDMI-USB-Multi-format-S/