Abstract
A 29-year-old pregnant woman was admitted to the hospital because of dyspnea and left chest pain. We preferentially considered the maternal safety and performed artificial abortion. Chest computed tomographic (CT) scan and magnetic resonance imaging (MRI) revealed a 15×8×16cm tumor on the left anterior chest wall, which had compressed the heart. The pathological diagnosis of ultrasonography- guided biopsy specimen was desmoid tumor. Tumor resection was done. The left chest wall including the 7th to the 10th ribs was resected with the pericardium and diaphragm. A wide defect of the chest wall was reconstructed with mesh. However, the patient developed wound infection, and the infected mesh had to be removed. The defect of the chest wall was reconstructed with a free tensor fascia lata musculocutaneous flap. No evidence of recurrence has been found for 6 years after the resection. Desmoid tumors during pregnancy are rare and the courses of treatment are controversial. Further accumulation of cases is necessary.