1985 Volume 38 Issue 4 Pages 246-248
A mediastinal tumor was encountered in a slaughtered hybrid hog with no clinical signs. It was of irregular cone shape and located in the right cervicothoracic portion. It was 9.5×6.0×5.6cm in size and weighed 220g. It entered the right lobe of the thymus with no obvious boundary, covered with a common dense fibrous capsule.
The cut surface of the tumor was milky white in color and divided into irregular lobules with necrosis and hemorrhage at the center. The other organs, including lymph nodes, had no remarkable changes. Histopathologically, the normal thymus tissue was seen in the peripheral portion of the mass. The tumor was composed mainly of polyhcdral and spindle-shaped epithelial cells and lymphcytes. It was diagnosed as thymoma with predominant epithelial cells.
