case_images: PMC10906048_01
case_images: The tumor was endobronchial with an extension into the surrounding lung parenchyma and no attachment to the visceral pleura. The cut surface had a whorled white tan appearance with focal myxoid and hemorrhage changes.
case_images: 10.1177_20363613241234201-fig1.jpg
case_images: PMC10906048_01_10.1177_20363613241234201-fig1.jpg
case_images: fig1-20363613241234201
case_images: The cut surface had a whorled white tan appearance with focal myxoid and hemorrhage changes (Figure 1).
case_images: Crisscrossing fascicles of bland spindle tumor cells within hyaline to myxoid stroma that tends to vary in different areas of the tumor.
case_images: 10.1177_20363613241234201-fig2.jpg
case_images: PMC10906048_01_10.1177_20363613241234201-fig2.jpg
case_images: fig2-20363613241234201
case_images: It was composed of bland spindle cells arranged in crisscrossing fascicles within hyaline to myxoid stroma that tends to vary in different areas of the tumor (Figure 2).
case_images: The neoplastic cells showed strong nuclear immunoreactivity for MUC4.
case_images: 10.1177_20363613241234201-fig3.jpg
case_images: PMC10906048_01_10.1177_20363613241234201-fig3.jpg
case_images: fig3-20363613241234201
case_images: Immunohistochemically, the neoplastic cells showed immunoreactivity for CD99 and MUC4 with a strong and diffuse expression of this antigen (Figure 3).