case_images: PMC9301116_01
case_images: FNAC: low power (10x view) clusters of small round cells with scant
  cytoplasm.
case_images: 10.1177_2632010X221112455-fig1.jpg
case_images: PMC9301116_01_10.1177_2632010X221112455-fig1.jpg
case_images: fig1-2632010X221112455
case_images: FNAC of the mass was performed and it showed features of fibroliposarcoma (Figure 1).
case_images: Gross morphology: Fatty tumour encasing the right kidney.
case_images: 10.1177_2632010X221112455-fig2.jpg
case_images: PMC9301116_01_10.1177_2632010X221112455-fig2.jpg
case_images: fig2-2632010X221112455
case_images: Grossly the tumour gave an impression of a liposarcoma but the microscopy was altogether a different story with areas of spindle cells, epitheloid cells, focal areas of ganglion like cells and large areas of myxoid changes (Figure 2).
case_images: H & E Staining: low power (10x view) areas of tumour showing spindle
  cells and epitheloid cells with occasional scattered cells having large
  hyperchromatic nuclei and scant cytoplasm.
case_images: 10.1177_2632010X221112455-fig3.jpg
case_images: PMC9301116_01_10.1177_2632010X221112455-fig3.jpg
case_images: fig3-2632010X221112455
case_images: Haematoxylin and eosin staining showed a neoplasm with high cellularity and mostly spindle-shaped cells arranged in storiform pattern (Figure 3).
case_images: SMA Negative: high power (40x view) tumour cells are SMA negative, blood
  vessels and connective tissues acting as positive control.
case_images: 10.1177_2632010X221112455-fig4.jpg
case_images: PMC9301116_01_10.1177_2632010X221112455-fig4.jpg
case_images: fig4-2632010X221112455
case_images: Alk-1 was applied (Figures 4 and 5). All of these IHC panels came negative and increased the complexity and dilemma of diagnosis.
case_images: S 100 Negative: high power (40x view) tumour cells are S100 negative.
case_images: 10.1177_2632010X221112455-fig5.jpg
case_images: PMC9301116_01_10.1177_2632010X221112455-fig5.jpg
case_images: fig5-2632010X221112455
case_images: Alk-1 was applied (Figures 4 and 5). All of these IHC panels came negative and increased the complexity and dilemma of diagnosis.
case_images: MDM2 : high power (40x view) strong nuclear positivity seen in tumour
  cells.
case_images: 10.1177_2632010X221112455-fig6.jpg
case_images: PMC9301116_01_10.1177_2632010X221112455-fig6.jpg
case_images: fig6-2632010X221112455
case_images: Subsequently other immunostainings such as MDM2, cdk4 and p16 were performed (Figures 6-8).
case_images: CDK4: high power (40x view) strong nuclear positivity seen in tumour
  cells.
case_images: 10.1177_2632010X221112455-fig7.jpg
case_images: PMC9301116_01_10.1177_2632010X221112455-fig7.jpg
case_images: fig7-2632010X221112455
case_images: Subsequently other immunostainings such as MDM2, cdk4 and p16 were performed (Figures 6-8).
case_images: p16: high power (40x view) strong nuclear positivity seen in tumour
  cells.
case_images: 10.1177_2632010X221112455-fig8.jpg
case_images: PMC9301116_01_10.1177_2632010X221112455-fig8.jpg
case_images: fig8-2632010X221112455
case_images: Subsequently other immunostainings such as MDM2, cdk4 and p16 were performed (Figures 6-8).