[A case of lung scar cancer with special pathohistological feature and high CA 19-9 level]

A 58-year-old woman complained of cough and fever. CX-P and chest CT revealed pneumonic shadow and serum CA 19-9 level was high. Since the malignant cells were found in the bronchial lavage fluid, the lower lobectomy of the left lung was done. Both macroscopically and microscopically, adenocarcinoma only existed in 2-3 mm width at the peripheral site of the scar lesion. The postoperative CA 19-9 values continued to be high, suggesting the recurrence of the cancer. After 23 months from the first operation, the upper lobe of the left lung was resected on the base of the similar findings in CX-P and chest CT. The histological finding of the specimen was compatible with the scar cancer described above. After the second operation, the serum CA 19-9 value decreased to normal. We reported a case of the lung scar cancer with special pathohistological feature.