Primary intratracheal neurilemmoma in a 10-year-old girl: A case report

Figure 1 Preoperative and postoperative imaging. A: Computed tomography (CT) revealed a mass occluding about 90% of the tracheal lumen; B: Contrast-enhanced CT a soft tissue mass with obvious enhancement on the right posterolateral wall of the trachea; C: CT indicated a slight protrusion at the position of the incision.

Figure 2 Fiberoptic bronchoscopy findings. A: A mass was located in the trachea at the 4- to 7-o’clock position about 1 cm below the vocal cords; B: The spherical part of the mass was removed by an electrocautery snare; C: The base was ablated by a low-temperature ion probe; D: Most of the base was removed; E: There was a slight protrusion at the position of the incision.

Figure 3 Pathological images of tumor cells. A: A histologic section from the tumor shows that the tumor cells were spindled with elongated palisading nuclei (hematoxylin–eosin stain, 400 ×); B: The tumor cells showed diffuse and positive S-100 staining by immunohistochemistry (streptavidin peroxidase method, 200 ×).