[An advanced aged case of intrapulmonary metastasis of non-small cell lung cancer successfully controlled with S-1 capsule therapy alone for an extended period].

The patient was an 84-year-old male. About 7 months after surgery for a non-small cell lung cancer StageIII B, granular shadows were noted on his bilateral lungs on CT; and the level of CA 19-9 , a tumor marker, had increased. These findings led to a diagnosis of intrapulmonary tumor metastasis. Treatment with a platinum-based antineoplastic agent was recommended,but the patient refused it because of his age. The patient was thus placed under observation. Because the tumor appeared to increase in size, treatment was initiated using S-1 capsules (hereafter abbreviated to S-1) alone. Each course consisted of S-1 at a dosage of 100 mg/body/day, twice daily for 21 days, followed by 14 days of drug withdrawal. After the completion of one course, the level of the tumor marker was reduced to normal. After 6 courses were completed, CT indicated a marked reduction or elimination of the intrapulmonary metastatic foci. Malignant phenomenon exceeding grade 3 was no longer recognized,and it was possible to deliver the scheduled dosage of S-1 throughout the entire series of courses. At the end of the 14th course, no signs of exacerbation or recurrence were recognized. It has been about 18 months after the S-1 single therapy was started. This therapy is still being continued.