Glomus tumor of the trachea: a rare case report.

A tracheal glomus tumor is extremely rare. There were approximately 18 reported cases before in China. Here we report a 48-year-old male with glomus tumor of the trachea. The computed tomography (CT) scan of the chest showed a nodulein the basalsegmentof right lower lobe, focal uplift in the left-posterior wall of the trachea, measured 1.5×1.2×1.0 cm. Microscopically, the tumor tissue was rich with vessels, shaped flake-nest, and the tumor consisted of a sheet of uniform cells surrounding the vascular spaces. Immumohistochemical staining were positive for SMA, vimentin, collagen IV, CD34, the Ki-67 proliferation activity was low (<1%), and were negative for Syn, CgA, S-100, AE1/AE3 and EMA. PSA staining showing clear cell borders. With a review of the literature, the clinical, pathological characteristics and treatment modalities of this rare tumor are discussed.