Abstract
We experienced an interesting case of anterior mediastinal mature treatoma. A 20-year-old woman was admitted to our department with a suspicion of mediastinal tumor found by chest roentgenogram. She had no symptoms but laboratory data showed elevation of serum SCC and CA19-9. Computed tomography and MRI revealed a heterogeneous multi-cystic lesion, measuring 11×11×9.5cm in size, located close to the right side of the heart. Under a diagnosis of anterior mediastinal teratoma, she underwent tumorectomy. The tumor had a capsule and contained fluid like oils, fat, and rice gruel with short hairs. It was histologically proved to be a benign mature teratoma consisting of several components such as epithelium, bone, cartilage, bone marrow, brain, thymus, pancreas, endometrium, endosalpinx and adipose tissue. CA19-9 and CEA were immunohistochemically demonstrated in the tumor cells. Postoperative course was uneventful and SCC and CA19-9 both decreased to within normal range.
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