case_images: PMC5797600_01
case_images: Chest CT. Transverse/coronal/sagittal planes demonstrate a round homogenous mass 32 mm x 27 mm in size in the superior segment of right lower lobe.
case_images: fonc-08-00011-g001.jpg
case_images: PMC5797600_01_fonc-08-00011-g001.jpg
case_images: F1
case_images: Chest CT showed a small, well-defined, round, and solid lesion (32 mm x 27 mm), in the superior segment of right lower lobe (Figure 1).
case_images: Positron-emission tomography (PET) demonstrates a diffuse, low FDG uptake (SUVmax 2.1) of the lesion, which exceeded that of vascular structure of the mediastinum (SUVmax 1.7).
case_images: fonc-08-00011-g002.jpg
case_images: PMC5797600_01_fonc-08-00011-g002.jpg
case_images: F2
case_images: Positron-emission tomography (PET) demonstrated a diffuse, low FDG uptake (SUVmax 2.1) of the lesion, which exceeded that of vascular structure of the mediastinum (SUVmax 1.7) (Figure 2).
case_images: (A) H-E stain revealed an area of encapsulated neoplasm surrounded by lung tissue. (B) Microscopic examination revealed proliferation of elongated tumor cells having spindle-shaped nuclei, with cellular palisading. No necrosis or nuclear atypia was observed. Immunohistochemical staining demonstrated positive staining of the tumor cells for S-100 protein.
case_images: fonc-08-00011-g003.jpg
case_images: PMC5797600_01_fonc-08-00011-g003.jpg
case_images: F3
case_images: Immunohistochemical staining was positive for S-100 protein and EMA(-), PANK(-), CD68(-), SMA(-), Desmine(-), CD31(-) (Figure 3).