Most metastatic bone disease appears in the axial skeleton. Appendicular bone metastases are usually found in cases of general spread of the disease, and frequent sites are in the femur and humerus. A solitary appendicular bone metastasis is rare. The authors report a case of lung cancer with unusual presentation of a solitary fibular metastasis. The bone scan showed a solitary fusiform hot lesion in the fibular shaft mimicking the typical appearance of a stress fracture. A metastatic fibular lesion from lung cancer was confirmed by excision biopsy.