66-year-old female was diagnosed, following persistent cough, with non-operable tumor of her lung with satellite nodules, and chemotherapy was initiated (first Cisplatin and Gemcitabine, and then switched to Tarceva). Response evaluation following the fourth cycle of chemotherapy showed either stability or an initiation of tumor response, but bone scintigraphy that was performed 6 months later revealed an area of increased uptake in the left hemithorax which could be suggestive of a secondary bone lesion.