case_images: PMC3420768_01
case_images: High power H and E image of a monotonous small round blue cell infiltrate.
case_images: CRIM.OTOLARYNGOLOGY2011-484976.001.jpg
case_images: PMC3420768_01_CRIM.OTOLARYNGOLOGY2011-484976.001.jpg
case_images: fig1
case_images: A guided FNA reported suspicious cytology showing sheets of undifferentiated cells amongst an infiltrate of uniform small blue cells with a high nuclear-cytoplasmic ratio (Figure 1).
case_images: Crisp membrane staining with CD99.
case_images: CRIM.OTOLARYNGOLOGY2011-484976.002.jpg
case_images: PMC3420768_01_CRIM.OTOLARYNGOLOGY2011-484976.002.jpg
case_images: fig2
case_images: The morphological features, however, with supporting immunohistochemical expression of the CD99/MIC2 antigen led to a diagnosis of Ewing's sarcoma (Figure 2). 
case_images: CT axial section showing tumour invading right zygomatic arch.
case_images: CRIM.OTOLARYNGOLOGY2011-484976.003.jpg
case_images: PMC3420768_01_CRIM.OTOLARYNGOLOGY2011-484976.003.jpg
case_images: fig3
case_images: A single-photon emission computed tomography (SPECT) scan demonstrated an increased tracer uptake in the right zygomatic arch with the bone being atrophic and irregular, eroded by a 2.9 x 1.6 cm nodule adjacent to the temporalis muscle (Figure 3).