Abstract
We report an unusual primary case of pulmonary sarcoma that developed in the
lung of a 36-year-old woman. The tumor had histologic, immunologic and
ultrastructural features identical to those of biphasic synovial sarcoma of the
soft tissue. It consisted of an intimate admixture of cytokeratin and epithelial
membrane antigen(EMA)-positive neoplastic epithelial cells and vimentin-positive
fibroblast-like spindle cells with areas of hyalinization. The patient had a
lobectomy and showed no evidence of recurrence or tumor at other sites 15 months
after surgery. This case is an useful addition to the small number of published
reports on pulmonary synovial sarcoma. The distinctive features of this neoplasm
allow it to be different from other types of primary and metastatic malignancies
in the lung.